I would also be for coming up with our own colormap. That said, I think simply modifying algae won't be enough, since it is too perceptually nonlinear. On Wed, Jan 6, 2016 at 10:32 AM, John ZuHone wrote:

I would go for modifying algae.

...

On Jan 6, 2016, at 11:30 AM, Matthew Turk wrote:

Hi folks,

For a long time we've used "algae," which was designed by Britton about eight years ago, as the default colormap. This has been really nice for "branding" yt -- if you see an algae plot, it's probably (not definitely) made with yt. But it's also not accessible from a colorblindness perspective. Stefan van der Walt has been giving some really great talks lately about building a better colormap for matplotlib (e.g., https://www.youtube.com/watch?v=xAoljeRJ3lU ) which culminated in viridis, which is shipping in recent versions of matplotlib and will become the default.

In support of this, he built a tool called viscm which can generate reduced versions of colormaps to show what they would be like with varying degrees of insensitivity to color. I've generated outputs from viscm of three of the custom colormaps we ship with yt:

Algae: https://images.hub.yt/u/fido/m/d275d5e1-png/ Cubehelix: https://images.hub.yt/u/fido/m/8e698928-png/ (I believe this is now also shipped with MPL) Kamae: https://images.hub.yt/u/fido/m/e0e40efa-png/

I love algae, but it's not the best from an accessibility perspective.

I'd like to propose that we use a new default colormap. If we do this, I see two options:

* Retain a "branding" by developing a new one either by using the techniques used by matplotlib (or one of the maps they opted not to use) or by modifying algae to be more accessible; looking at the response functions, I suspect it would be reasonably possible to modify it. (Modifying algae is my preference.) * Use viridis (which we may then have to ship if we have older versions of matplotlib to support)

-Matt _______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org

_______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org

_______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org

There is a really excellent paper on designing color maps called "Color Sequences for Univariate Maps: Theory, Experiments, and Principles" that you can get here: http://ccom.unh.edu/sites/default/files/publications/Ware_1988_CGA_Color_seq... If we design a new colormap, this would be a good reference along with those scipy resources. I personally would love to have an accessible, yt-custom colormap. On Wed, Jan 6, 2016 at 11:50 AM, Erik Schnetter wrote:

I think there are several colourmaps that were created when Viridis was invented. I personally like Inferno.

-erik

On Wed, Jan 6, 2016 at 11:34 AM, Nathan Goldbaum wrote:

...

I would also be for coming up with our own colormap. That said, I think simply modifying algae won't be enough, since it is too perceptually nonlinear.

On Wed, Jan 6, 2016 at 10:32 AM, John ZuHone wrote:

...

I would go for modifying algae.

...

On Jan 6, 2016, at 11:30 AM, Matthew Turk

wrote:

...

...

Hi folks,

For a long time we've used "algae," which was designed by Britton about eight years ago, as the default colormap. This has been really nice for "branding" yt -- if you see an algae plot, it's probably (not definitely) made with yt. But it's also not accessible from a colorblindness perspective. Stefan van der Walt has been giving some really great talks lately about building a better colormap for matplotlib (e.g., https://www.youtube.com/watch?v=xAoljeRJ3lU ) which culminated in viridis, which is shipping in recent versions of matplotlib and will become the default.

In support of this, he built a tool called viscm which can generate reduced versions of colormaps to show what they would be like with varying degrees of insensitivity to color. I've generated outputs from viscm of three of the custom colormaps we ship with yt:

Algae: https://images.hub.yt/u/fido/m/d275d5e1-png/ Cubehelix: https://images.hub.yt/u/fido/m/8e698928-png/ (I believe this is now also shipped with MPL) Kamae: https://images.hub.yt/u/fido/m/e0e40efa-png/

I love algae, but it's not the best from an accessibility perspective.

I'd like to propose that we use a new default colormap. If we do this, I see two options:

* Retain a "branding" by developing a new one either by using the techniques used by matplotlib (or one of the maps they opted not to use) or by modifying algae to be more accessible; looking at the response functions, I suspect it would be reasonably possible to modify it. (Modifying algae is my preference.) * Use viridis (which we may then have to ship if we have older versions of matplotlib to support)

-Matt _______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org

_______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org

_______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org

-- Erik Schnetter http://www.perimeterinstitute.ca/personal/eschnetter/ _______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org

_______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org

There was a fair bit of discussion about colormaps - terrible, useful, beautiful - at IEEE Vis last October. The viridis colormap was a featured one. So was the traditional rainbow, which lots of info-vis and perceptual people piled on to criticize. Among design criteria for a continuous-valued colormap is whether it's "sequential" (like the typical yt colormap, or viridis) or "diverging". You'd want a diverging colormap to show signed deviations from a norm - where the eye should be caught by places where a value is either much less than, or much more than, something in the middle. Is it worth offering a typical divergent colormap, as well as a new typical sequential one, in yt? Note that among the Stefan van der Walt & Nathaniel Smith writeup ( http://bids.github.io/colormap/ ) on their development of better cmaps, they use Nathan Goldbaum's galaxy evolution as a test case for six (sequential) examples! => http://vorpus.org/~njs/goldbaum-galaxies-all-colormaps.mkv A neat web site with sample colormaps - aimed at mapping discrete values on geographic maps, so not directly applicable but cool - is this, by Cynthia Brewer and Mark Harrower at PSU: http://colorbrewer2.org/ It has a library of predesigned cmaps, and lets you sift them by being colorblind-safe, photocopy safe, etc. ________________________________ From: yt-dev [yt-dev-bounces@lists.spacepope.org] on behalf of B.W. Keller [kellerbw@mcmaster.ca] Sent: Wednesday, January 06, 2016 12:13 To: yt-dev@lists.spacepope.org Subject: Re: [yt-dev] Default colormap There is a really excellent paper on designing color maps called "Color Sequences for Univariate Maps: Theory, Experiments, and Principles" that you can get here: http://ccom.unh.edu/sites/default/files/publications/Ware_1988_CGA_Color_seq...https://urldefense.proofpoint.com/v2/url?u=http-3A__ccom.unh.edu_sites_default_files_publications_Ware-5F1988-5FCGA-5FColor-5Fsequences-5Funivariate-5Fmaps.pdf&d=BQMFaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=hgcBC3x6dKFoTrmFmMYYbKNfiHZlGLKliIidd1LwmHI&m=FMHeB3pNOAeqOzZIyPgy5-uxuN2ghGC9-8XQuthPiIU&s=5Yg0N-A3hbVCKwltZjUQBJOQZK6OFbo4G3VWKT9uVZ0&e= If we design a new colormap, this would be a good reference along with those scipy resources. I personally would love to have an accessible, yt-custom colormap. On Wed, Jan 6, 2016 at 11:50 AM, Erik Schnetter mailto:schnetter@gmail.com> wrote: I think there are several colourmaps that were created when Viridis was invented. I personally like Inferno. -erik On Wed, Jan 6, 2016 at 11:34 AM, Nathan Goldbaum mailto:nathan12343@gmail.com> wrote:

I would also be for coming up with our own colormap. That said, I think simply modifying algae won't be enough, since it is too perceptually nonlinear.

On Wed, Jan 6, 2016 at 10:32 AM, John ZuHone mailto:jzuhone@gmail.com> wrote:

...

I would go for modifying algae.

...

On Jan 6, 2016, at 11:30 AM, Matthew Turk mailto:matthewturk@gmail.com> wrote:

Hi folks,

For a long time we've used "algae," which was designed by Britton about eight years ago, as the default colormap. This has been really nice for "branding" yt -- if you see an algae plot, it's probably (not definitely) made with yt. But it's also not accessible from a colorblindness perspective. Stefan van der Walt has been giving some really great talks lately about building a better colormap for matplotlib (e.g., https://www.youtube.com/watch?v=xAoljeRJ3lUhttps://urldefense.proofpoint.com/v2/url?u=https-3A__www.youtube.com_watch-3Fv-3DxAoljeRJ3lU&d=BQMFaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=hgcBC3x6dKFoTrmFmMYYbKNfiHZlGLKliIidd1LwmHI&m=FMHeB3pNOAeqOzZIyPgy5-uxuN2ghGC9-8XQuthPiIU&s=fpeIMGnkAI5_PfL699BNCowLgIQr4xXy-oK90Bub2MU&e= ) which culminated in viridis, which is shipping in recent versions of matplotlib and will become the default.

In support of this, he built a tool called viscm which can generate reduced versions of colormaps to show what they would be like with varying degrees of insensitivity to color. I've generated outputs from viscm of three of the custom colormaps we ship with yt:

Algae: https://images.hub.yt/u/fido/m/d275d5e1-png/https://urldefense.proofpoint.com/v2/url?u=https-3A__images.hub.yt_u_fido_m_d275d5e1-2Dpng_&d=BQMFaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=hgcBC3x6dKFoTrmFmMYYbKNfiHZlGLKliIidd1LwmHI&m=FMHeB3pNOAeqOzZIyPgy5-uxuN2ghGC9-8XQuthPiIU&s=5En_z8QNwijy3Ou9Ah6_Fzfdp8gSXcs4bphf-SZBGuE&e= Cubehelix: https://images.hub.yt/u/fido/m/8e698928-png/https://urldefense.proofpoint.com/v2/url?u=https-3A__images.hub.yt_u_fido_m_8e698928-2Dpng_&d=BQMFaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=hgcBC3x6dKFoTrmFmMYYbKNfiHZlGLKliIidd1LwmHI&m=FMHeB3pNOAeqOzZIyPgy5-uxuN2ghGC9-8XQuthPiIU&s=y4k79vB300hkxSOvNBPaMYSeMSdgWY3yJP2TJ1e61YA&e= (I believe this is now also shipped with MPL) Kamae: https://images.hub.yt/u/fido/m/e0e40efa-png/https://urldefense.proofpoint.com/v2/url?u=https-3A__images.hub.yt_u_fido_m_e0e40efa-2Dpng_&d=BQMFaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=hgcBC3x6dKFoTrmFmMYYbKNfiHZlGLKliIidd1LwmHI&m=FMHeB3pNOAeqOzZIyPgy5-uxuN2ghGC9-8XQuthPiIU&s=xvnX_JDGJFjLaPam1gf5BwfAS4lF7qjJ5CLmd6ExJzQ&e=

I love algae, but it's not the best from an accessibility perspective.

I'd like to propose that we use a new default colormap. If we do this, I see two options:

* Retain a "branding" by developing a new one either by using the techniques used by matplotlib (or one of the maps they opted not to use) or by modifying algae to be more accessible; looking at the response functions, I suspect it would be reasonably possible to modify it. (Modifying algae is my preference.) * Use viridis (which we may then have to ship if we have older versions of matplotlib to support)

-Matt _______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.orgmailto:yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.orghttps://urldefense.proofpoint.com/v2/url?u=http-3A__lists.spacepope.org_listinfo.cgi_yt-2Ddev-2Dspacepope.org&d=BQMFaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=hgcBC3x6dKFoTrmFmMYYbKNfiHZlGLKliIidd1LwmHI&m=FMHeB3pNOAeqOzZIyPgy5-uxuN2ghGC9-8XQuthPiIU&s=BaeHL9R3SqrWDRh-sTc8pLPmBg83iPA2WHUwC8XJkdM&e=

_______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.orgmailto:yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.orghttps://urldefense.proofpoint.com/v2/url?u=http-3A__lists.spacepope.org_listinfo.cgi_yt-2Ddev-2Dspacepope.org&d=BQMFaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=hgcBC3x6dKFoTrmFmMYYbKNfiHZlGLKliIidd1LwmHI&m=FMHeB3pNOAeqOzZIyPgy5-uxuN2ghGC9-8XQuthPiIU&s=BaeHL9R3SqrWDRh-sTc8pLPmBg83iPA2WHUwC8XJkdM&e=

_______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.orgmailto:yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.orghttps://urldefense.proofpoint.com/v2/url?u=http-3A__lists.spacepope.org_listinfo.cgi_yt-2Ddev-2Dspacepope.org&d=BQMFaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=hgcBC3x6dKFoTrmFmMYYbKNfiHZlGLKliIidd1LwmHI&m=FMHeB3pNOAeqOzZIyPgy5-uxuN2ghGC9-8XQuthPiIU&s=BaeHL9R3SqrWDRh-sTc8pLPmBg83iPA2WHUwC8XJkdM&e=

-- Erik Schnetter mailto:schnetter@gmail.com> http://www.perimeterinstitute.ca/personal/eschnetter/https://urldefense.proofpoint.com/v2/url?u=http-3A__www.perimeterinstitute.ca_personal_eschnetter_&d=BQMFaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=hgcBC3x6dKFoTrmFmMYYbKNfiHZlGLKliIidd1LwmHI&m=FMHeB3pNOAeqOzZIyPgy5-uxuN2ghGC9-8XQuthPiIU&s=7jImD2ypg2lTI_MTSODmVdgQnwBMJvGou2W8_PSAADg&e= _______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.orgmailto:yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.orghttps://urldefense.proofpoint.com/v2/url?u=http-3A__lists.spacepope.org_listinfo.cgi_yt-2Ddev-2Dspacepope.org&d=BQMFaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=hgcBC3x6dKFoTrmFmMYYbKNfiHZlGLKliIidd1LwmHI&m=FMHeB3pNOAeqOzZIyPgy5-uxuN2ghGC9-8XQuthPiIU&s=BaeHL9R3SqrWDRh-sTc8pLPmBg83iPA2WHUwC8XJkdM&e= _______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org

Hi Stuart and everyone else, This is great info. I appreciate everyone's thoughtful replies. Having both a sequential colormap (which would replace algae) and a diverging colormap, would be awesome. The Paraview devs shipped the new matplotlib ones (like Inferno) in 5.0. I think it would be a fun experiment to see if we can come up with something sufficiently "branded" or different. And then if we can't, fall back on something like Inferno? -Matt On Wed, Jan 6, 2016 at 12:48 PM, Levy, Stuart A wrote:

There was a fair bit of discussion about colormaps - terrible, useful, beautiful - at IEEE Vis last October. The viridis colormap was a featured one. So was the traditional rainbow, which lots of info-vis and perceptual people piled on to criticize.

Among design criteria for a continuous-valued colormap is whether it's "sequential" (like the typical yt colormap, or viridis) or "diverging". You'd want a diverging colormap to show signed deviations from a norm - where the eye should be caught by places where a value is either much less than, or much more than, something in the middle. Is it worth offering a typical divergent colormap, as well as a new typical sequential one, in yt?

Note that among the Stefan van der Walt & Nathaniel Smith writeup ( http://bids.github.io/colormap/ ) on their development of better cmaps, they use Nathan Goldbaum's galaxy evolution as a test case for six (sequential) examples! => http://vorpus.org/~njs/goldbaum-galaxies-all-colormaps.mkv

A neat web site with sample colormaps - aimed at mapping discrete values on geographic maps, so not directly applicable but cool - is this, by Cynthia Brewer and Mark Harrower at PSU: http://colorbrewer2.org/ It has a library of predesigned cmaps, and lets you sift them by being colorblind-safe, photocopy safe, etc. ________________________________ From: yt-dev [yt-dev-bounces@lists.spacepope.org] on behalf of B.W. Keller [kellerbw@mcmaster.ca] Sent: Wednesday, January 06, 2016 12:13 To: yt-dev@lists.spacepope.org Subject: Re: [yt-dev] Default colormap

There is a really excellent paper on designing color maps called "Color Sequences for Univariate Maps: Theory, Experiments, and Principles" that you can get here: http://ccom.unh.edu/sites/default/files/publications/Ware_1988_CGA_Color_seq...

If we design a new colormap, this would be a good reference along with those scipy resources. I personally would love to have an accessible, yt-custom colormap.

On Wed, Jan 6, 2016 at 11:50 AM, Erik Schnetter wrote:

...

I think there are several colourmaps that were created when Viridis was invented. I personally like Inferno.

-erik

On Wed, Jan 6, 2016 at 11:34 AM, Nathan Goldbaum wrote:

...

I would also be for coming up with our own colormap. That said, I think simply modifying algae won't be enough, since it is too perceptually nonlinear.

On Wed, Jan 6, 2016 at 10:32 AM, John ZuHone wrote:

...

I would go for modifying algae.

...

On Jan 6, 2016, at 11:30 AM, Matthew Turk wrote:

Hi folks,

For a long time we've used "algae," which was designed by Britton about eight years ago, as the default colormap. This has been really nice for "branding" yt -- if you see an algae plot, it's probably (not definitely) made with yt. But it's also not accessible from a colorblindness perspective. Stefan van der Walt has been giving some really great talks lately about building a better colormap for matplotlib (e.g., https://www.youtube.com/watch?v=xAoljeRJ3lU ) which culminated in viridis, which is shipping in recent versions of matplotlib and will become the default.

In support of this, he built a tool called viscm which can generate reduced versions of colormaps to show what they would be like with varying degrees of insensitivity to color. I've generated outputs from viscm of three of the custom colormaps we ship with yt:

Algae: https://images.hub.yt/u/fido/m/d275d5e1-png/ Cubehelix: https://images.hub.yt/u/fido/m/8e698928-png/ (I believe this is now also shipped with MPL) Kamae: https://images.hub.yt/u/fido/m/e0e40efa-png/

I love algae, but it's not the best from an accessibility perspective.

I'd like to propose that we use a new default colormap. If we do this, I see two options:

* Retain a "branding" by developing a new one either by using the techniques used by matplotlib (or one of the maps they opted not to use) or by modifying algae to be more accessible; looking at the response functions, I suspect it would be reasonably possible to modify it. (Modifying algae is my preference.) * Use viridis (which we may then have to ship if we have older versions of matplotlib to support)

-Matt _______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org

_______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org

_______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org

-- Erik Schnetter http://www.perimeterinstitute.ca/personal/eschnetter/ _______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org

_______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org

_______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org

The one I came up with is here: http://imgur.com/HhdqA3T The script is here: http://paste.yt-project.org/show/6165/ On Mon, Jan 18, 2016 at 9:45 AM, Matthew Turk wrote:

Hi all,

I've experimented a bit and come up with this:

https://images.hub.yt/u/fido/m/9bbe3cf6-png/

The script:

http://paste.yt-project.org/show/6151/

This was designed with the viscm project, which is awfully cool. What do folks think? I think Kacper and Nathan also experimented with viscm and have some ideas too, so maybe we should put it up for an eventual vote.

Also, I would campaign for calling whatever our new colormap turns out to be one of these three things, in increasing order of my preference:

agar kelp kanten

-Matt

...

Hi Stuart and everyone else,

This is great info. I appreciate everyone's thoughtful replies.

Having both a sequential colormap (which would replace algae) and a diverging colormap, would be awesome. The Paraview devs shipped the new matplotlib ones (like Inferno) in 5.0. I think it would be a fun experiment to see if we can come up with something sufficiently "branded" or different. And then if we can't, fall back on something like Inferno?

-Matt

On Wed, Jan 6, 2016 at 12:48 PM, Levy, Stuart A wrote:

...

There was a fair bit of discussion about colormaps - terrible, useful, beautiful - at IEEE Vis last October. The viridis colormap was a featured one. So was the traditional rainbow, which lots of info-vis and

...

...

people piled on to criticize.

Among design criteria for a continuous-valued colormap is whether it's "sequential" (like the typical yt colormap, or viridis) or "diverging". You'd want a diverging colormap to show signed deviations from a norm - where the eye should be caught by places where a value is either much less than, or much more than, something in the middle. Is it worth offering a typical divergent colormap, as well as a new typical sequential one, in yt?

Note that among the Stefan van der Walt & Nathaniel Smith writeup ( http://bids.github.io/colormap/ ) on their development of better cmaps, they use Nathan Goldbaum's galaxy evolution as a test case for six (sequential) examples! => http://vorpus.org/~njs/goldbaum-galaxies-all-colormaps.mkv

A neat web site with sample colormaps - aimed at mapping discrete values on geographic maps, so not directly applicable but cool - is this, by Cynthia Brewer and Mark Harrower at PSU: http://colorbrewer2.org/ It has a library of predesigned cmaps, and lets you sift them by being colorblind-safe, photocopy safe, etc. ________________________________ From: yt-dev [yt-dev-bounces@lists.spacepope.org] on behalf of B.W. Keller [kellerbw@mcmaster.ca] Sent: Wednesday, January 06, 2016 12:13 To: yt-dev@lists.spacepope.org Subject: Re: [yt-dev] Default colormap

There is a really excellent paper on designing color maps called "Color Sequences for Univariate Maps: Theory, Experiments, and Principles"

...

...

can get here:

http://ccom.unh.edu/sites/default/files/publications/Ware_1988_CGA_Color_seq...

...

If we design a new colormap, this would be a good reference along with

...

...

scipy resources. I personally would love to have an accessible, yt-custom colormap.

On Wed, Jan 6, 2016 at 11:50 AM, Erik Schnetter wrote:

...

I think there are several colourmaps that were created when Viridis was invented. I personally like Inferno.

-erik

On Wed, Jan 6, 2016 at 11:34 AM, Nathan Goldbaum <

nathan12343@gmail.com>

...

wrote:

...

I would also be for coming up with our own colormap. That said, I

On Thu, Jan 14, 2016 at 10:57 AM, Matthew Turk wrote: perceptual that you those think

...

...

...

...

simply modifying algae won't be enough, since it is too perceptually nonlinear.

On Wed, Jan 6, 2016 at 10:32 AM, John ZuHone wrote:

...

I would go for modifying algae.

> On Jan 6, 2016, at 11:30 AM, Matthew Turk > wrote: > > Hi folks, > > For a long time we've used "algae," which was designed by Britton > about eight years ago, as the default colormap. This has been

really

...

> nice for "branding" yt -- if you see an algae plot, it's probably > (not > definitely) made with yt. But it's also not accessible from a > colorblindness perspective. Stefan van der Walt has been giving some > really great talks lately about building a better colormap for > matplotlib (e.g., https://www.youtube.com/watch?v=xAoljeRJ3lU ) which > culminated in viridis, which is shipping in recent versions of > matplotlib and will become the default. > > In support of this, he built a tool called viscm which can generate > reduced versions of colormaps to show what they would be like with > varying degrees of insensitivity to color. I've generated outputs > from viscm of three of the custom colormaps we ship with yt: > > Algae: https://images.hub.yt/u/fido/m/d275d5e1-png/ > Cubehelix: https://images.hub.yt/u/fido/m/8e698928-png/ (I believe > this is now also shipped with MPL) > Kamae: https://images.hub.yt/u/fido/m/e0e40efa-png/ > > I love algae, but it's not the best from an accessibility > perspective. > > I'd like to propose that we use a new default colormap. If we do > this, I see two options: > > * Retain a "branding" by developing a new one either by using the > techniques used by matplotlib (or one of the maps they opted not to > use) or by modifying algae to be more accessible; looking at the > response functions, I suspect it would be reasonably possible to > modify it. (Modifying algae is my preference.) > * Use viridis (which we may then have to ship if we have older > versions of matplotlib to support) > > -Matt > _______________________________________________ > yt-dev mailing list > yt-dev@lists.spacepope.org > http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org

_______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org

_______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org

-- Erik Schnetter http://www.perimeterinstitute.ca/personal/eschnetter/ _______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org

_______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org

---

yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org

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Wow, all of these look great. I think I like Matt's best for painting our bikeshed, but I would be happy with any of them. On Mon, Jan 18, 2016 at 11:10 AM, Kacper Kowalik wrote:

On 01/18/2016 09:45 AM, Matthew Turk wrote:

...

Hi all,

I've experimented a bit and come up with this:

https://images.hub.yt/u/fido/m/9bbe3cf6-png/

The script:

http://paste.yt-project.org/show/6151/

This was designed with the viscm project, which is awfully cool. What do folks think? I think Kacper and Nathan also experimented with viscm and have some ideas too, so maybe we should put it up for an eventual vote.

This is my experiment:

https://images.hub.yt/u/fido/m/f180a901-png/

Source:

http://paste.yt-project.org/show/6166/

Cheers, Kacper

...

Also, I would campaign for calling whatever our new colormap turns out to be one of these three things, in increasing order of my preference:

agar kelp kanten

-Matt

On Thu, Jan 14, 2016 at 10:57 AM, Matthew Turk

...

...

Hi Stuart and everyone else,

This is great info. I appreciate everyone's thoughtful replies.

Having both a sequential colormap (which would replace algae) and a diverging colormap, would be awesome. The Paraview devs shipped the new matplotlib ones (like Inferno) in 5.0. I think it would be a fun experiment to see if we can come up with something sufficiently "branded" or different. And then if we can't, fall back on something like Inferno?

-Matt

On Wed, Jan 6, 2016 at 12:48 PM, Levy, Stuart A wrote:

...

There was a fair bit of discussion about colormaps - terrible, useful, beautiful - at IEEE Vis last October. The viridis colormap was a featured one. So was the traditional rainbow, which lots of info-vis and

...

...

...

people piled on to criticize.

Among design criteria for a continuous-valued colormap is whether it's "sequential" (like the typical yt colormap, or viridis) or "diverging". You'd want a diverging colormap to show signed deviations from a norm - where the eye should be caught by places where a value is either much less than, or much more than, something in the middle. Is it worth offering a typical divergent colormap, as well as a new typical sequential one, in yt?

Note that among the Stefan van der Walt & Nathaniel Smith writeup ( http://bids.github.io/colormap/ ) on their development of better cmaps, they use Nathan Goldbaum's galaxy evolution as a test case for six (sequential) examples! => http://vorpus.org/~njs/goldbaum-galaxies-all-colormaps.mkv

A neat web site with sample colormaps - aimed at mapping discrete values on geographic maps, so not directly applicable but cool - is this, by Cynthia Brewer and Mark Harrower at PSU: http://colorbrewer2.org/ It has a library of predesigned cmaps, and lets you sift them by being colorblind-safe, photocopy safe, etc. ________________________________ From: yt-dev [yt-dev-bounces@lists.spacepope.org] on behalf of B.W. Keller [kellerbw@mcmaster.ca] Sent: Wednesday, January 06, 2016 12:13 To: yt-dev@lists.spacepope.org Subject: Re: [yt-dev] Default colormap

There is a really excellent paper on designing color maps called "Color Sequences for Univariate Maps: Theory, Experiments, and Principles"

...

...

...

can get here:

http://ccom.unh.edu/sites/default/files/publications/Ware_1988_CGA_Color_seq...

...

If we design a new colormap, this would be a good reference along with

...

...

...

scipy resources. I personally would love to have an accessible, yt-custom colormap.

On Wed, Jan 6, 2016 at 11:50 AM, Erik Schnetter wrote:

...

I think there are several colourmaps that were created when Viridis was invented. I personally like Inferno.

-erik

On Wed, Jan 6, 2016 at 11:34 AM, Nathan Goldbaum <

nathan12343@gmail.com>

...

wrote:

...

I would also be for coming up with our own colormap. That said, I

wrote: perceptual that you those think

...

...

...

...

...

simply modifying algae won't be enough, since it is too perceptually nonlinear.

On Wed, Jan 6, 2016 at 10:32 AM, John ZuHone wrote: > > I would go for modifying algae. > >> On Jan 6, 2016, at 11:30 AM, Matthew Turk >> wrote: >> >> Hi folks, >> >> For a long time we've used "algae," which was designed by Britton >> about eight years ago, as the default colormap. This has been really >> nice for "branding" yt -- if you see an algae plot, it's probably >> (not >> definitely) made with yt. But it's also not accessible from a >> colorblindness perspective. Stefan van der Walt has been giving some >> really great talks lately about building a better colormap for >> matplotlib (e.g., https://www.youtube.com/watch?v=xAoljeRJ3lU ) which >> culminated in viridis, which is shipping in recent versions of >> matplotlib and will become the default. >> >> In support of this, he built a tool called viscm which can generate >> reduced versions of colormaps to show what they would be like with >> varying degrees of insensitivity to color. I've generated outputs >> from viscm of three of the custom colormaps we ship with yt: >> >> Algae: https://images.hub.yt/u/fido/m/d275d5e1-png/ >> Cubehelix: https://images.hub.yt/u/fido/m/8e698928-png/ (I believe >> this is now also shipped with MPL) >> Kamae: https://images.hub.yt/u/fido/m/e0e40efa-png/ >> >> I love algae, but it's not the best from an accessibility >> perspective. >> >> I'd like to propose that we use a new default colormap. If we do >> this, I see two options: >> >> * Retain a "branding" by developing a new one either by using the >> techniques used by matplotlib (or one of the maps they opted not to >> use) or by modifying algae to be more accessible; looking at the >> response functions, I suspect it would be reasonably possible to >> modify it. (Modifying algae is my preference.) >> * Use viridis (which we may then have to ship if we have older >> versions of matplotlib to support) >> >> -Matt >> _______________________________________________ >> yt-dev mailing list >> yt-dev@lists.spacepope.org >> http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org > > _______________________________________________ > yt-dev mailing list > yt-dev@lists.spacepope.org > http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org

_______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org

-- Erik Schnetter http://www.perimeterinstitute.ca/personal/eschnetter/ _______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org

_______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org

---

yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org

_______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org

_______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org

I think we should probably put it up for a vote and we should send an e-mail to yt-users about it. On Thu, Jan 21, 2016 at 12:06 PM, Matthew Turk wrote:

Hi folks,

I've put up a comparison image:

http://i.imgur.com/Afxdb0G.jpg

Left is Kacper, middle is me, right is Nathan.

Honestly I think all could go in, but we should pick a default -- whether it's one of these or a different one. Anyone have a strong opinion?

-Matt

On Mon, Jan 18, 2016 at 10:19 AM, B.W. Keller wrote:

...

Wow, all of these look great. I think I like Matt's best for painting our bikeshed, but I would be happy with any of them.

On Mon, Jan 18, 2016 at 11:10 AM, Kacper Kowalik

...

wrote:

...

On 01/18/2016 09:45 AM, Matthew Turk wrote:

...

Hi all,

I've experimented a bit and come up with this:

https://images.hub.yt/u/fido/m/9bbe3cf6-png/

The script:

http://paste.yt-project.org/show/6151/

This was designed with the viscm project, which is awfully cool. What do folks think? I think Kacper and Nathan also experimented with viscm and have some ideas too, so maybe we should put it up for an eventual vote.

This is my experiment:

https://images.hub.yt/u/fido/m/f180a901-png/

Source:

http://paste.yt-project.org/show/6166/

Cheers, Kacper

...

Also, I would campaign for calling whatever our new colormap turns out to be one of these three things, in increasing order of my preference:

agar kelp kanten

-Matt

On Thu, Jan 14, 2016 at 10:57 AM, Matthew Turk

...

...

Hi Stuart and everyone else,

This is great info. I appreciate everyone's thoughtful replies.

Having both a sequential colormap (which would replace algae) and a diverging colormap, would be awesome. The Paraview devs shipped the new matplotlib ones (like Inferno) in 5.0. I think it would be a fun experiment to see if we can come up with something sufficiently "branded" or different. And then if we can't, fall back on something like Inferno?

-Matt

On Wed, Jan 6, 2016 at 12:48 PM, Levy, Stuart A wrote:

...

There was a fair bit of discussion about colormaps - terrible, useful, beautiful - at IEEE Vis last October. The viridis colormap was a featured one. So was the traditional rainbow, which lots of info-vis and

...

...

...

people piled on to criticize.

Among design criteria for a continuous-valued colormap is whether it's "sequential" (like the typical yt colormap, or viridis) or "diverging". You'd want a diverging colormap to show signed deviations from a norm - where the eye should be caught by places where a value is either much less than, or much more than, something in the middle. Is it worth offering a typical divergent colormap, as well as a new typical sequential one, in yt?

Note that among the Stefan van der Walt & Nathaniel Smith writeup ( http://bids.github.io/colormap/ ) on their development of better cmaps, they use Nathan Goldbaum's galaxy evolution as a test case for six (sequential) examples! => http://vorpus.org/~njs/goldbaum-galaxies-all-colormaps.mkv

A neat web site with sample colormaps - aimed at mapping discrete values on geographic maps, so not directly applicable but cool - is this, by Cynthia Brewer and Mark Harrower at PSU: http://colorbrewer2.org/ It has a library of predesigned cmaps, and lets you sift them by being colorblind-safe, photocopy safe, etc. ________________________________ From: yt-dev [yt-dev-bounces@lists.spacepope.org] on behalf of B.W. Keller [kellerbw@mcmaster.ca] Sent: Wednesday, January 06, 2016 12:13 To: yt-dev@lists.spacepope.org Subject: Re: [yt-dev] Default colormap

There is a really excellent paper on designing color maps called "Color Sequences for Univariate Maps: Theory, Experiments, and Principles"

...

...

...

can get here:

http://ccom.unh.edu/sites/default/files/publications/Ware_1988_CGA_Color_seq...

...

If we design a new colormap, this would be a good reference along

with those

...

scipy resources. I personally would love to have an accessible, yt-custom colormap.

On Wed, Jan 6, 2016 at 11:50 AM, Erik Schnetter wrote: > > I think there are several colourmaps that were created when Viridis > was invented. I personally like Inferno. > > -erik > > On Wed, Jan 6, 2016 at 11:34 AM, Nathan Goldbaum < nathan12343@gmail.com> > wrote: >> I would also be for coming up with our own colormap. That said, I

...

...

...

>> simply modifying algae won't be enough, since it is too

wrote: perceptual that you think perceptually

...

...

...

>> nonlinear. >> >> On Wed, Jan 6, 2016 at 10:32 AM, John ZuHone wrote: >>> >>> I would go for modifying algae. >>> >>>> On Jan 6, 2016, at 11:30 AM, Matthew Turk

...

...

>>>> wrote: >>>> >>>> Hi folks, >>>> >>>> For a long time we've used "algae," which was designed by Britton >>>> about eight years ago, as the default colormap. This has been really >>>> nice for "branding" yt -- if you see an algae plot, it's probably >>>> (not >>>> definitely) made with yt. But it's also not accessible from a >>>> colorblindness perspective. Stefan van der Walt has been giving some >>>> really great talks lately about building a better colormap for >>>> matplotlib (e.g., https://www.youtube.com/watch?v=xAoljeRJ3lU ) which >>>> culminated in viridis, which is shipping in recent versions of >>>> matplotlib and will become the default. >>>> >>>> In support of this, he built a tool called viscm which can generate >>>> reduced versions of colormaps to show what they would be like with >>>> varying degrees of insensitivity to color. I've generated outputs >>>> from viscm of three of the custom colormaps we ship with yt: >>>> >>>> Algae: https://images.hub.yt/u/fido/m/d275d5e1-png/ >>>> Cubehelix: https://images.hub.yt/u/fido/m/8e698928-png/ (I believe >>>> this is now also shipped with MPL) >>>> Kamae: https://images.hub.yt/u/fido/m/e0e40efa-png/ >>>> >>>> I love algae, but it's not the best from an accessibility >>>> perspective. >>>> >>>> I'd like to propose that we use a new default colormap. If we do >>>> this, I see two options: >>>> >>>> * Retain a "branding" by developing a new one either by using the >>>> techniques used by matplotlib (or one of the maps they opted not to >>>> use) or by modifying algae to be more accessible; looking at the >>>> response functions, I suspect it would be reasonably possible to >>>> modify it. (Modifying algae is my preference.) >>>> * Use viridis (which we may then have to ship if we have older >>>> versions of matplotlib to support) >>>> >>>> -Matt >>>> _______________________________________________ >>>> yt-dev mailing list >>>> yt-dev@lists.spacepope.org >>>> http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org >>> >>> _______________________________________________ >>> yt-dev mailing list >>> yt-dev@lists.spacepope.org >>> http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org >> >> >> >> _______________________________________________ >> yt-dev mailing list >> yt-dev@lists.spacepope.org >> http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org >> > > > > -- > Erik Schnetter > http://www.perimeterinstitute.ca/personal/eschnetter/ > _______________________________________________ > yt-dev mailing list > yt-dev@lists.spacepope.org > http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org

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---

yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org

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_______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org

_______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org

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Hi Mike, Ah, awesome. I will watch that. I do know that Ralf Kaehler designed one for the AMNH's show that was inverted from what we usually think. Sam might have reverse engineered it at some point... it'd be pretty cool to explore that type of thing as well! -Matt PS re: the middle colormap, your check is in the mail. On Thu, Jan 21, 2016 at 12:13 PM, Michael Zingale < michael.zingale@stonybrook.edu> wrote:

here's a link:

http://eric.ed.gov/?id=EJ1005874

really cool stuff.

On Thu, Jan 21, 2016 at 1:10 PM, Nathan Goldbaum wrote:

...

I think we should probably put it up for a vote and we should send an e-mail to yt-users about it.

On Thu, Jan 21, 2016 at 12:06 PM, Matthew Turk wrote:

...

Hi folks,

I've put up a comparison image:

http://i.imgur.com/Afxdb0G.jpg

Left is Kacper, middle is me, right is Nathan.

Honestly I think all could go in, but we should pick a default -- whether it's one of these or a different one. Anyone have a strong opinion?

-Matt

On Mon, Jan 18, 2016 at 10:19 AM, B.W. Keller wrote:

...

Wow, all of these look great. I think I like Matt's best for painting our bikeshed, but I would be happy with any of them.

On Mon, Jan 18, 2016 at 11:10 AM, Kacper Kowalik < xarthisius.kk@gmail.com> wrote:

...

On 01/18/2016 09:45 AM, Matthew Turk wrote:

...

Hi all,

I've experimented a bit and come up with this:

https://images.hub.yt/u/fido/m/9bbe3cf6-png/

The script:

http://paste.yt-project.org/show/6151/

This was designed with the viscm project, which is awfully cool. What do folks think? I think Kacper and Nathan also experimented with viscm and have some ideas too, so maybe we should put it up for an eventual vote.

This is my experiment:

https://images.hub.yt/u/fido/m/f180a901-png/

Source:

http://paste.yt-project.org/show/6166/

Cheers, Kacper

...

Also, I would campaign for calling whatever our new colormap turns

...

to be one of these three things, in increasing order of my

out preference:

...

agar kelp kanten

-Matt

On Thu, Jan 14, 2016 at 10:57 AM, Matthew Turk <

...

> Hi Stuart and everyone else, > > This is great info. I appreciate everyone's thoughtful replies. > > Having both a sequential colormap (which would replace algae) and a > diverging colormap, would be awesome. The Paraview devs shipped the > new matplotlib ones (like Inferno) in 5.0. I think it would be a fun > experiment to see if we can come up with something sufficiently > "branded" or different. And then if we can't, fall back on something > like Inferno? > > -Matt > > On Wed, Jan 6, 2016 at 12:48 PM, Levy, Stuart A < salevy@illinois.edu> wrote: >> There was a fair bit of discussion about colormaps - terrible, useful, >> beautiful - at IEEE Vis last October. The viridis colormap was a featured >> one. So was the traditional rainbow, which lots of info-vis and

...

>> people piled on to criticize. >> >> Among design criteria for a continuous-valued colormap is whether it's >> "sequential" (like the typical yt colormap, or viridis) or "diverging". >> You'd want a diverging colormap to show signed deviations from a norm - >> where the eye should be caught by places where a value is either much less >> than, or much more than, something in the middle. Is it worth offering a >> typical divergent colormap, as well as a new typical sequential one, in yt? >> >> Note that among the Stefan van der Walt & Nathaniel Smith writeup ( >> http://bids.github.io/colormap/ ) on their development of better cmaps, they >> use Nathan Goldbaum's galaxy evolution as a test case for six (sequential) >> examples! => http://vorpus.org/~njs/goldbaum-galaxies-all-colormaps.mkv >> >> A neat web site with sample colormaps - aimed at mapping discrete values on >> geographic maps, so not directly applicable but cool - is this, by Cynthia >> Brewer and Mark Harrower at PSU: >> http://colorbrewer2.org/ >> It has a library of predesigned cmaps, and lets you sift them by being >> colorblind-safe, photocopy safe, etc. >> ________________________________ >> From: yt-dev [yt-dev-bounces@lists.spacepope.org] on behalf of B.W. Keller >> [kellerbw@mcmaster.ca] >> Sent: Wednesday, January 06, 2016 12:13 >> To: yt-dev@lists.spacepope.org >> Subject: Re: [yt-dev] Default colormap >> >> There is a really excellent paper on designing color maps called "Color >> Sequences for Univariate Maps: Theory, Experiments, and Principles" that you >> can get here: >> http://ccom.unh.edu/sites/default/files/publications/Ware_1988_CGA_Color_seq... >> >> If we design a new colormap, this would be a good reference along with those >> scipy resources. I personally would love to have an accessible, yt-custom >> colormap. >> >> On Wed, Jan 6, 2016 at 11:50 AM, Erik Schnetter < schnetter@gmail.com> wrote: >>> >>> I think there are several colourmaps that were created when Viridis >>> was invented. I personally like Inferno. >>> >>> -erik >>> >>> On Wed, Jan 6, 2016 at 11:34 AM, Nathan Goldbaum < nathan12343@gmail.com> >>> wrote: >>>> I would also be for coming up with our own colormap. That said, I think >>>> simply modifying algae won't be enough, since it is too

...

>>>> nonlinear. >>>> >>>> On Wed, Jan 6, 2016 at 10:32 AM, John ZuHone wrote: >>>>> >>>>> I would go for modifying algae. >>>>> >>>>>> On Jan 6, 2016, at 11:30 AM, Matthew Turk < matthewturk@gmail.com> >>>>>> wrote: >>>>>> >>>>>> Hi folks, >>>>>> >>>>>> For a long time we've used "algae," which was designed by Britton >>>>>> about eight years ago, as the default colormap. This has been really >>>>>> nice for "branding" yt -- if you see an algae plot, it's

...

>>>>>> (not >>>>>> definitely) made with yt. But it's also not accessible from a >>>>>> colorblindness perspective. Stefan van der Walt has been giving some >>>>>> really great talks lately about building a better colormap for >>>>>> matplotlib (e.g., https://www.youtube.com/watch?v=xAoljeRJ3lU ) which >>>>>> culminated in viridis, which is shipping in recent versions of >>>>>> matplotlib and will become the default. >>>>>> >>>>>> In support of this, he built a tool called viscm which can generate >>>>>> reduced versions of colormaps to show what they would be like with >>>>>> varying degrees of insensitivity to color. I've generated outputs >>>>>> from viscm of three of the custom colormaps we ship with yt: >>>>>> >>>>>> Algae: https://images.hub.yt/u/fido/m/d275d5e1-png/ >>>>>> Cubehelix: https://images.hub.yt/u/fido/m/8e698928-png/ (I believe >>>>>> this is now also shipped with MPL) >>>>>> Kamae: https://images.hub.yt/u/fido/m/e0e40efa-png/ >>>>>> >>>>>> I love algae, but it's not the best from an accessibility >>>>>> perspective. >>>>>> >>>>>> I'd like to propose that we use a new default colormap. If we do >>>>>> this, I see two options: >>>>>> >>>>>> * Retain a "branding" by developing a new one either by using

...

>>>>>> techniques used by matplotlib (or one of the maps they opted not to >>>>>> use) or by modifying algae to be more accessible; looking at

matthewturk@gmail.com> wrote: perceptual perceptually probably the the

...

>>>>>> response functions, I suspect it would be reasonably possible to >>>>>> modify it. (Modifying algae is my preference.) >>>>>> * Use viridis (which we may then have to ship if we have older >>>>>> versions of matplotlib to support) >>>>>> >>>>>> -Matt >>>>>> _______________________________________________ >>>>>> yt-dev mailing list >>>>>> yt-dev@lists.spacepope.org >>>>>> http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org >>>>> >>>>> _______________________________________________ >>>>> yt-dev mailing list >>>>> yt-dev@lists.spacepope.org >>>>> http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org >>>> >>>> >>>> >>>> _______________________________________________ >>>> yt-dev mailing list >>>> yt-dev@lists.spacepope.org >>>> http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org >>>> >>> >>> >>> >>> -- >>> Erik Schnetter >>> http://www.perimeterinstitute.ca/personal/eschnetter/ >>> _______________________________________________ >>> yt-dev mailing list >>> yt-dev@lists.spacepope.org >>> http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org >> >> >> >> _______________________________________________ >> yt-dev mailing list >> yt-dev@lists.spacepope.org >> http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org >> _______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org

_______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org

_______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org

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-- Michael Zingale Associate Professor

Dept. of Physics & Astronomy • Stony Brook University • Stony Brook, NY 11794-3800 *phone*: 631-632-8225 *e-mail*: Michael.Zingale@stonybrook.edu *web*: http://www.astro.sunysb.edu/mzingale github: http://github.com/zingale

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Sounds good, but before we do that, I think we should have a suitable waiting period for others to propose them. I'll send an email out to yt-users asking for ideas on it. On Thu, Jan 21, 2016 at 12:10 PM, Nathan Goldbaum wrote:

I think we should probably put it up for a vote and we should send an e-mail to yt-users about it.

On Thu, Jan 21, 2016 at 12:06 PM, Matthew Turk wrote:

...

Hi folks,

I've put up a comparison image:

http://i.imgur.com/Afxdb0G.jpg

Left is Kacper, middle is me, right is Nathan.

Honestly I think all could go in, but we should pick a default -- whether it's one of these or a different one. Anyone have a strong opinion?

-Matt

On Mon, Jan 18, 2016 at 10:19 AM, B.W. Keller wrote:

...

Wow, all of these look great. I think I like Matt's best for painting our bikeshed, but I would be happy with any of them.

On Mon, Jan 18, 2016 at 11:10 AM, Kacper Kowalik < xarthisius.kk@gmail.com> wrote:

...

On 01/18/2016 09:45 AM, Matthew Turk wrote:

...

Hi all,

I've experimented a bit and come up with this:

https://images.hub.yt/u/fido/m/9bbe3cf6-png/

The script:

http://paste.yt-project.org/show/6151/

This was designed with the viscm project, which is awfully cool. What do folks think? I think Kacper and Nathan also experimented with viscm and have some ideas too, so maybe we should put it up for an eventual vote.

This is my experiment:

https://images.hub.yt/u/fido/m/f180a901-png/

Source:

http://paste.yt-project.org/show/6166/

Cheers, Kacper

...

Also, I would campaign for calling whatever our new colormap turns out to be one of these three things, in increasing order of my preference:

agar kelp kanten

-Matt

On Thu, Jan 14, 2016 at 10:57 AM, Matthew Turk

...

...

Hi Stuart and everyone else,

This is great info. I appreciate everyone's thoughtful replies.

Having both a sequential colormap (which would replace algae) and a diverging colormap, would be awesome. The Paraview devs shipped the new matplotlib ones (like Inferno) in 5.0. I think it would be a fun experiment to see if we can come up with something sufficiently "branded" or different. And then if we can't, fall back on something like Inferno?

-Matt

On Wed, Jan 6, 2016 at 12:48 PM, Levy, Stuart A wrote: > There was a fair bit of discussion about colormaps - terrible, useful, > beautiful - at IEEE Vis last October. The viridis colormap was a featured > one. So was the traditional rainbow, which lots of info-vis and

...

...

> people piled on to criticize. > > Among design criteria for a continuous-valued colormap is whether it's > "sequential" (like the typical yt colormap, or viridis) or "diverging". > You'd want a diverging colormap to show signed deviations from a norm - > where the eye should be caught by places where a value is either much less > than, or much more than, something in the middle. Is it worth offering a > typical divergent colormap, as well as a new typical sequential one, in yt? > > Note that among the Stefan van der Walt & Nathaniel Smith writeup ( > http://bids.github.io/colormap/ ) on their development of better cmaps, they > use Nathan Goldbaum's galaxy evolution as a test case for six (sequential) > examples! => http://vorpus.org/~njs/goldbaum-galaxies-all-colormaps.mkv > > A neat web site with sample colormaps - aimed at mapping discrete values on > geographic maps, so not directly applicable but cool - is this, by Cynthia > Brewer and Mark Harrower at PSU: > http://colorbrewer2.org/ > It has a library of predesigned cmaps, and lets you sift them by being > colorblind-safe, photocopy safe, etc. > ________________________________ > From: yt-dev [yt-dev-bounces@lists.spacepope.org] on behalf of B.W. Keller > [kellerbw@mcmaster.ca] > Sent: Wednesday, January 06, 2016 12:13 > To: yt-dev@lists.spacepope.org > Subject: Re: [yt-dev] Default colormap > > There is a really excellent paper on designing color maps called "Color > Sequences for Univariate Maps: Theory, Experiments, and Principles"

...

...

> can get here: > http://ccom.unh.edu/sites/default/files/publications/Ware_1988_CGA_Color_seq... > > If we design a new colormap, this would be a good reference along with those > scipy resources. I personally would love to have an accessible, yt-custom > colormap. > > On Wed, Jan 6, 2016 at 11:50 AM, Erik Schnetter < schnetter@gmail.com> wrote: >> >> I think there are several colourmaps that were created when Viridis >> was invented. I personally like Inferno. >> >> -erik >> >> On Wed, Jan 6, 2016 at 11:34 AM, Nathan Goldbaum < nathan12343@gmail.com> >> wrote: >>> I would also be for coming up with our own colormap. That said, I

...

...

>>> simply modifying algae won't be enough, since it is too

...

...

>>> nonlinear. >>> >>> On Wed, Jan 6, 2016 at 10:32 AM, John ZuHone wrote: >>>> >>>> I would go for modifying algae. >>>> >>>>> On Jan 6, 2016, at 11:30 AM, Matthew Turk < matthewturk@gmail.com> >>>>> wrote: >>>>> >>>>> Hi folks, >>>>> >>>>> For a long time we've used "algae," which was designed by Britton >>>>> about eight years ago, as the default colormap. This has been really >>>>> nice for "branding" yt -- if you see an algae plot, it's

...

...

>>>>> (not >>>>> definitely) made with yt. But it's also not accessible from a >>>>> colorblindness perspective. Stefan van der Walt has been giving some >>>>> really great talks lately about building a better colormap for >>>>> matplotlib (e.g., https://www.youtube.com/watch?v=xAoljeRJ3lU ) which >>>>> culminated in viridis, which is shipping in recent versions of >>>>> matplotlib and will become the default. >>>>> >>>>> In support of this, he built a tool called viscm which can generate >>>>> reduced versions of colormaps to show what they would be like with >>>>> varying degrees of insensitivity to color. I've generated outputs >>>>> from viscm of three of the custom colormaps we ship with yt: >>>>> >>>>> Algae: https://images.hub.yt/u/fido/m/d275d5e1-png/ >>>>> Cubehelix: https://images.hub.yt/u/fido/m/8e698928-png/ (I believe >>>>> this is now also shipped with MPL) >>>>> Kamae: https://images.hub.yt/u/fido/m/e0e40efa-png/ >>>>> >>>>> I love algae, but it's not the best from an accessibility >>>>> perspective. >>>>> >>>>> I'd like to propose that we use a new default colormap. If we do >>>>> this, I see two options: >>>>> >>>>> * Retain a "branding" by developing a new one either by using

wrote: perceptual that you think perceptually probably the

...

...

>>>>> techniques used by matplotlib (or one of the maps they opted not to >>>>> use) or by modifying algae to be more accessible; looking at the >>>>> response functions, I suspect it would be reasonably possible to >>>>> modify it. (Modifying algae is my preference.) >>>>> * Use viridis (which we may then have to ship if we have older >>>>> versions of matplotlib to support) >>>>> >>>>> -Matt >>>>> _______________________________________________ >>>>> yt-dev mailing list >>>>> yt-dev@lists.spacepope.org >>>>> http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org >>>> >>>> _______________________________________________ >>>> yt-dev mailing list >>>> yt-dev@lists.spacepope.org >>>> http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org >>> >>> >>> >>> _______________________________________________ >>> yt-dev mailing list >>> yt-dev@lists.spacepope.org >>> http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org >>> >> >> >> >> -- >> Erik Schnetter >> http://www.perimeterinstitute.ca/personal/eschnetter/ >> _______________________________________________ >> yt-dev mailing list >> yt-dev@lists.spacepope.org >> http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org > > > > _______________________________________________ > yt-dev mailing list > yt-dev@lists.spacepope.org > http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org >

---

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Thanks, Cameron. Unless we get any other submissions, I've got a Google Form ready to go to ask for preferences on this that I'll send out tomorrow morning. It includes the montages and color space diagrams; they can all be viewed here: https://drive.google.com/open?id=0B1DaRHnSGW8Za0U4cEFTTzVPcVE -Matt On Wed, Jan 27, 2016 at 10:22 PM, Cameron Hummels wrote:

I'd like to propose this colormap:

http://i.imgur.com/nKFZWSC.png

Script here:

http://paste.yt-project.org/show/6194/

Cameron

On Thu, Jan 21, 2016 at 11:05 AM, Matthew Turk wrote:

...

Sounds good, but before we do that, I think we should have a suitable waiting period for others to propose them. I'll send an email out to yt-users asking for ideas on it.

On Thu, Jan 21, 2016 at 12:10 PM, Nathan Goldbaum wrote:

...

I think we should probably put it up for a vote and we should send an e-mail to yt-users about it.

On Thu, Jan 21, 2016 at 12:06 PM, Matthew Turk wrote:

...

Hi folks,

I've put up a comparison image:

http://i.imgur.com/Afxdb0G.jpg

Left is Kacper, middle is me, right is Nathan.

Honestly I think all could go in, but we should pick a default -- whether it's one of these or a different one. Anyone have a strong opinion?

-Matt

On Mon, Jan 18, 2016 at 10:19 AM, B.W. Keller wrote:

...

Wow, all of these look great. I think I like Matt's best for painting our bikeshed, but I would be happy with any of them.

On Mon, Jan 18, 2016 at 11:10 AM, Kacper Kowalik < xarthisius.kk@gmail.com> wrote:

...

On 01/18/2016 09:45 AM, Matthew Turk wrote: > Hi all, > > I've experimented a bit and come up with this: > > https://images.hub.yt/u/fido/m/9bbe3cf6-png/ > > The script: > > http://paste.yt-project.org/show/6151/ > > This was designed with the viscm project, which is awfully cool. What > do folks think? I think Kacper and Nathan also experimented with > viscm and have some ideas too, so maybe we should put it up for an > eventual vote.

This is my experiment:

https://images.hub.yt/u/fido/m/f180a901-png/

Source:

http://paste.yt-project.org/show/6166/

Cheers, Kacper

> > Also, I would campaign for calling whatever our new colormap turns out > to be one of these three things, in increasing order of my preference: > > agar > kelp > kanten > > -Matt > > On Thu, Jan 14, 2016 at 10:57 AM, Matthew Turk < matthewturk@gmail.com> wrote: >> Hi Stuart and everyone else, >> >> This is great info. I appreciate everyone's thoughtful replies. >> >> Having both a sequential colormap (which would replace algae) and a >> diverging colormap, would be awesome. The Paraview devs shipped the >> new matplotlib ones (like Inferno) in 5.0. I think it would be a fun >> experiment to see if we can come up with something sufficiently >> "branded" or different. And then if we can't, fall back on something >> like Inferno? >> >> -Matt >> >> On Wed, Jan 6, 2016 at 12:48 PM, Levy, Stuart A < salevy@illinois.edu> wrote: >>> There was a fair bit of discussion about colormaps - terrible, useful, >>> beautiful - at IEEE Vis last October. The viridis colormap was a featured >>> one. So was the traditional rainbow, which lots of info-vis and perceptual >>> people piled on to criticize. >>> >>> Among design criteria for a continuous-valued colormap is whether it's >>> "sequential" (like the typical yt colormap, or viridis) or "diverging". >>> You'd want a diverging colormap to show signed deviations from a norm - >>> where the eye should be caught by places where a value is either much less >>> than, or much more than, something in the middle. Is it worth offering a >>> typical divergent colormap, as well as a new typical sequential one, in yt? >>> >>> Note that among the Stefan van der Walt & Nathaniel Smith writeup ( >>> http://bids.github.io/colormap/ ) on their development of better cmaps, they >>> use Nathan Goldbaum's galaxy evolution as a test case for six (sequential) >>> examples! => http://vorpus.org/~njs/goldbaum-galaxies-all-colormaps.mkv >>> >>> A neat web site with sample colormaps - aimed at mapping discrete values on >>> geographic maps, so not directly applicable but cool - is this, by Cynthia >>> Brewer and Mark Harrower at PSU: >>> http://colorbrewer2.org/ >>> It has a library of predesigned cmaps, and lets you sift them by being >>> colorblind-safe, photocopy safe, etc. >>> ________________________________ >>> From: yt-dev [yt-dev-bounces@lists.spacepope.org] on behalf of B.W. Keller >>> [kellerbw@mcmaster.ca] >>> Sent: Wednesday, January 06, 2016 12:13 >>> To: yt-dev@lists.spacepope.org >>> Subject: Re: [yt-dev] Default colormap >>> >>> There is a really excellent paper on designing color maps called "Color >>> Sequences for Univariate Maps: Theory, Experiments, and Principles" that you >>> can get here: >>> http://ccom.unh.edu/sites/default/files/publications/Ware_1988_CGA_Color_seq... >>> >>> If we design a new colormap, this would be a good reference along with those >>> scipy resources. I personally would love to have an accessible, yt-custom >>> colormap. >>> >>> On Wed, Jan 6, 2016 at 11:50 AM, Erik Schnetter < schnetter@gmail.com> wrote: >>>> >>>> I think there are several colourmaps that were created when Viridis >>>> was invented. I personally like Inferno. >>>> >>>> -erik >>>> >>>> On Wed, Jan 6, 2016 at 11:34 AM, Nathan Goldbaum < nathan12343@gmail.com> >>>> wrote: >>>>> I would also be for coming up with our own colormap. That said, I think >>>>> simply modifying algae won't be enough, since it is too perceptually >>>>> nonlinear. >>>>> >>>>> On Wed, Jan 6, 2016 at 10:32 AM, John ZuHone wrote: >>>>>> >>>>>> I would go for modifying algae. >>>>>> >>>>>>> On Jan 6, 2016, at 11:30 AM, Matthew Turk < matthewturk@gmail.com> >>>>>>> wrote: >>>>>>> >>>>>>> Hi folks, >>>>>>> >>>>>>> For a long time we've used "algae," which was designed by Britton >>>>>>> about eight years ago, as the default colormap. This has been really >>>>>>> nice for "branding" yt -- if you see an algae plot, it's probably >>>>>>> (not >>>>>>> definitely) made with yt. But it's also not accessible from a >>>>>>> colorblindness perspective. Stefan van der Walt has been giving some >>>>>>> really great talks lately about building a better colormap for >>>>>>> matplotlib (e.g., https://www.youtube.com/watch?v=xAoljeRJ3lU ) which >>>>>>> culminated in viridis, which is shipping in recent versions of >>>>>>> matplotlib and will become the default. >>>>>>> >>>>>>> In support of this, he built a tool called viscm which can generate >>>>>>> reduced versions of colormaps to show what they would be like with >>>>>>> varying degrees of insensitivity to color. I've generated outputs >>>>>>> from viscm of three of the custom colormaps we ship with yt: >>>>>>> >>>>>>> Algae: https://images.hub.yt/u/fido/m/d275d5e1-png/ >>>>>>> Cubehelix: https://images.hub.yt/u/fido/m/8e698928-png/ (I believe >>>>>>> this is now also shipped with MPL) >>>>>>> Kamae: https://images.hub.yt/u/fido/m/e0e40efa-png/ >>>>>>> >>>>>>> I love algae, but it's not the best from an accessibility >>>>>>> perspective. >>>>>>> >>>>>>> I'd like to propose that we use a new default colormap. If we do >>>>>>> this, I see two options: >>>>>>> >>>>>>> * Retain a "branding" by developing a new one either by using the >>>>>>> techniques used by matplotlib (or one of the maps they opted not to >>>>>>> use) or by modifying algae to be more accessible; looking at the >>>>>>> response functions, I suspect it would be reasonably possible to >>>>>>> modify it. (Modifying algae is my preference.) >>>>>>> * Use viridis (which we may then have to ship if we have older >>>>>>> versions of matplotlib to support) >>>>>>> >>>>>>> -Matt >>>>>>> _______________________________________________ >>>>>>> yt-dev mailing list >>>>>>> yt-dev@lists.spacepope.org >>>>>>> http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org >>>>>> >>>>>> _______________________________________________ >>>>>> yt-dev mailing list >>>>>> yt-dev@lists.spacepope.org >>>>>> http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org >>>>> >>>>> >>>>> >>>>> _______________________________________________ >>>>> yt-dev mailing list >>>>> yt-dev@lists.spacepope.org >>>>> http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org >>>>> >>>> >>>> >>>> >>>> -- >>>> Erik Schnetter >>>> http://www.perimeterinstitute.ca/personal/eschnetter/ >>>> _______________________________________________ >>>> yt-dev mailing list >>>> yt-dev@lists.spacepope.org >>>> http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org >>> >>> >>> >>> _______________________________________________ >>> yt-dev mailing list >>> yt-dev@lists.spacepope.org >>> http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org >>> > _______________________________________________ > yt-dev mailing list > yt-dev@lists.spacepope.org > http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org >

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-- Cameron Hummels NSF Postdoctoral Fellow Department of Astronomy California Institute of Technology http://chummels.org

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On 01/21/2016 12:12 PM, Michael Zingale wrote:

I like middle. (and this is not based on who's it is -- but you shouldn't have told us the names)

Btw, this reminds me that I saw a very nice talk at the AAPT meeting by a UCSC graduate (Zoe ... last name escapes me). She did studies on using movies in teaching (and used a lot of Joel Primack's stuff), and worked with a range of students, and one of the conclusions is that students understood simulations of dark matter a lot better when the dark matter was colored dark instead of in bright colors. Seems obvious, in hindsight, but most of the movies you see online use bright colors / whites for high dark matter density. Her talk was very interesting, and it is nice to see someone thinking about how the color choices we make in movies affects how people learn from them.

I think colormaps for general audience should be different by default, e.g those silly astronomers tend to use blue for hot and red for cold, even though every bathroom faucet proves them wrong... Cheers, Kacper

On Thu, Jan 21, 2016 at 1:06 PM, Matthew Turk wrote:

...

Hi folks,

I've put up a comparison image:

http://i.imgur.com/Afxdb0G.jpg

Left is Kacper, middle is me, right is Nathan.

Honestly I think all could go in, but we should pick a default -- whether it's one of these or a different one. Anyone have a strong opinion?

-Matt

On Mon, Jan 18, 2016 at 10:19 AM, B.W. Keller wrote:

...

Wow, all of these look great. I think I like Matt's best for painting our bikeshed, but I would be happy with any of them.

On Mon, Jan 18, 2016 at 11:10 AM, Kacper Kowalik

...

wrote:

...

On 01/18/2016 09:45 AM, Matthew Turk wrote:

...

Hi all,

I've experimented a bit and come up with this:

https://images.hub.yt/u/fido/m/9bbe3cf6-png/

The script:

http://paste.yt-project.org/show/6151/

This was designed with the viscm project, which is awfully cool. What do folks think? I think Kacper and Nathan also experimented with viscm and have some ideas too, so maybe we should put it up for an eventual vote.

This is my experiment:

https://images.hub.yt/u/fido/m/f180a901-png/

Source:

http://paste.yt-project.org/show/6166/

Cheers, Kacper

...

Also, I would campaign for calling whatever our new colormap turns out to be one of these three things, in increasing order of my preference:

agar kelp kanten

-Matt

On Thu, Jan 14, 2016 at 10:57 AM, Matthew Turk

...

...

Hi Stuart and everyone else,

This is great info. I appreciate everyone's thoughtful replies.

Having both a sequential colormap (which would replace algae) and a diverging colormap, would be awesome. The Paraview devs shipped the new matplotlib ones (like Inferno) in 5.0. I think it would be a fun experiment to see if we can come up with something sufficiently "branded" or different. And then if we can't, fall back on something like Inferno?

-Matt

On Wed, Jan 6, 2016 at 12:48 PM, Levy, Stuart A wrote: > There was a fair bit of discussion about colormaps - terrible, useful, > beautiful - at IEEE Vis last October. The viridis colormap was a featured > one. So was the traditional rainbow, which lots of info-vis and

...

...

> people piled on to criticize. > > Among design criteria for a continuous-valued colormap is whether it's > "sequential" (like the typical yt colormap, or viridis) or "diverging". > You'd want a diverging colormap to show signed deviations from a norm - > where the eye should be caught by places where a value is either much less > than, or much more than, something in the middle. Is it worth offering a > typical divergent colormap, as well as a new typical sequential one, in yt? > > Note that among the Stefan van der Walt & Nathaniel Smith writeup ( > http://bids.github.io/colormap/ ) on their development of better cmaps, they > use Nathan Goldbaum's galaxy evolution as a test case for six (sequential) > examples! => http://vorpus.org/~njs/goldbaum-galaxies-all-colormaps.mkv > > A neat web site with sample colormaps - aimed at mapping discrete values on > geographic maps, so not directly applicable but cool - is this, by Cynthia > Brewer and Mark Harrower at PSU: > http://colorbrewer2.org/ > It has a library of predesigned cmaps, and lets you sift them by being > colorblind-safe, photocopy safe, etc. > ________________________________ > From: yt-dev [yt-dev-bounces@lists.spacepope.org] on behalf of B.W. Keller > [kellerbw@mcmaster.ca] > Sent: Wednesday, January 06, 2016 12:13 > To: yt-dev@lists.spacepope.org > Subject: Re: [yt-dev] Default colormap > > There is a really excellent paper on designing color maps called "Color > Sequences for Univariate Maps: Theory, Experiments, and Principles"

...

...

> can get here: > http://ccom.unh.edu/sites/default/files/publications/Ware_1988_CGA_Color_seq... > > If we design a new colormap, this would be a good reference along with those > scipy resources. I personally would love to have an accessible, yt-custom > colormap. > > On Wed, Jan 6, 2016 at 11:50 AM, Erik Schnetter wrote: >> >> I think there are several colourmaps that were created when Viridis >> was invented. I personally like Inferno. >> >> -erik >> >> On Wed, Jan 6, 2016 at 11:34 AM, Nathan Goldbaum < nathan12343@gmail.com> >> wrote: >>> I would also be for coming up with our own colormap. That said, I

...

...

>>> simply modifying algae won't be enough, since it is too

wrote: perceptual that you think perceptually

...

...

>>> nonlinear. >>> >>> On Wed, Jan 6, 2016 at 10:32 AM, John ZuHone wrote: >>>> >>>> I would go for modifying algae. >>>> >>>>> On Jan 6, 2016, at 11:30 AM, Matthew Turk

...

>>>>> wrote: >>>>> >>>>> Hi folks, >>>>> >>>>> For a long time we've used "algae," which was designed by Britton >>>>> about eight years ago, as the default colormap. This has been really >>>>> nice for "branding" yt -- if you see an algae plot, it's probably >>>>> (not >>>>> definitely) made with yt. But it's also not accessible from a >>>>> colorblindness perspective. Stefan van der Walt has been giving some >>>>> really great talks lately about building a better colormap for >>>>> matplotlib (e.g., https://www.youtube.com/watch?v=xAoljeRJ3lU ) which >>>>> culminated in viridis, which is shipping in recent versions of >>>>> matplotlib and will become the default. >>>>> >>>>> In support of this, he built a tool called viscm which can generate >>>>> reduced versions of colormaps to show what they would be like with >>>>> varying degrees of insensitivity to color. I've generated outputs >>>>> from viscm of three of the custom colormaps we ship with yt: >>>>> >>>>> Algae: https://images.hub.yt/u/fido/m/d275d5e1-png/ >>>>> Cubehelix: https://images.hub.yt/u/fido/m/8e698928-png/ (I believe >>>>> this is now also shipped with MPL) >>>>> Kamae: https://images.hub.yt/u/fido/m/e0e40efa-png/ >>>>> >>>>> I love algae, but it's not the best from an accessibility >>>>> perspective. >>>>> >>>>> I'd like to propose that we use a new default colormap. If we do >>>>> this, I see two options: >>>>> >>>>> * Retain a "branding" by developing a new one either by using the >>>>> techniques used by matplotlib (or one of the maps they opted not to >>>>> use) or by modifying algae to be more accessible; looking at the >>>>> response functions, I suspect it would be reasonably possible to >>>>> modify it. (Modifying algae is my preference.) >>>>> * Use viridis (which we may then have to ship if we have older >>>>> versions of matplotlib to support) >>>>> >>>>> -Matt >>>>> _______________________________________________ >>>>> yt-dev mailing list >>>>> yt-dev@lists.spacepope.org >>>>> http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org >>>> >>>> _______________________________________________ >>>> yt-dev mailing list >>>> yt-dev@lists.spacepope.org >>>> http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org >>> >>> >>> >>> _______________________________________________ >>> yt-dev mailing list >>> yt-dev@lists.spacepope.org >>> http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org >>> >> >> >> >> -- >> Erik Schnetter >> http://www.perimeterinstitute.ca/personal/eschnetter/ >> _______________________________________________ >> yt-dev mailing list >> yt-dev@lists.spacepope.org >> http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org > > > > _______________________________________________ > yt-dev mailing list > yt-dev@lists.spacepope.org > http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org >

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