The middle and right colormaps are the two best options in my mind because they have several unique colors in the interval between the two extremum, thus enabling a fuller range of data to be absorbed--especially in the phase plots and high resolution projections.
________________________________________ From: yt-dev yt-dev-bounces@lists.spacepope.org on behalf of yt-dev-request@lists.spacepope.org yt-dev-request@lists.spacepope.org Sent: Thursday, January 21, 2016 2:05 PM To: yt-dev@lists.spacepope.org Subject: yt-dev Digest, Vol 85, Issue 32
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Today's Topics:
1. Re: Default colormap (Matthew Turk)
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Message: 1 Date: Thu, 21 Jan 2016 13:05:07 -0600 From: Matthew Turk matthewturk@gmail.com To: "yt-dev@lists.spacepope.org" yt-dev@lists.spacepope.org Subject: Re: [yt-dev] Default colormap Message-ID: CALO3=5HASX+DekU1xW2zRoTPkLd6csho2Mg7+JqUWsFGbXi+5A@mail.gmail.com Content-Type: text/plain; charset="utf-8"
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 nathan12343@gmail.com 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 matthewturk@gmail.com 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 kellerbw@mcmaster.ca 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 jzuhone@gmail.com
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 schnetter@gmail.com >> 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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