[Matplotlib-users] Trying to reproduce plot with a certain colormap
vincent.adrien at gmail.com
vincent.adrien at gmail.com
Fri Aug 11 16:14:22 EDT 2017
Thank you Jody, I did not know that CMYK conversion could alter colors
that much; that is interesting.
Ben, maybe my cheap screen is tricking me here, but I would have say
that what is still missing in the CMYK conversion is the cyan/bright
blue part, not the yellow one. Anyway, as Jody wrote, it might just be a
matter of CMYK profile, doesn´t it?
Best,
Adrien
On 08/11/2017 01:02 PM, Benjamin Root wrote:
> The CMYK converted jet still has a bright yellow in there that is not in
> the one showed by Kris at all.
>
> On Fri, Aug 11, 2017 at 3:53 PM, Jody Klymak <jklymak at uvic.ca
> <mailto:jklymak at uvic.ca>> wrote:
>
> __
>
> On 11 Aug 2017, at 12:17, Klymak Jody wrote:
>
> This image has pretty clearly been converted to CMYK hence the
> dullness. Pretty convinced that's what jet looks like after a
> CMYK conversion.
>
> See:
>
> https://gist.github.com/jklymak/744db8cc538e5757ecc4eb4977bff3a3
> <https://gist.github.com/jklymak/744db8cc538e5757ecc4eb4977bff3a3>
>
> CMYK conversion was done in Illustrator.
>
> You could still argue that matplotlib’s “jet” gets darker at the
> high reds and low blues, and maybe the cyan is more bright. But you
> have to be pretty careful w/ CMYK conversions because it depends on
> the profiles used etc etc. I’d buy the argument that this is a
> matlab jet versus a matplotlib jet, but I think most of the
> perceived difference is because a CMYK conversion happened somewhere
> along the way.
>
> Cheers, Jody
>
> PS, I note the image /says/ that it is RGB, but then my converted
> image also says the same thing.
>
> Cheers. Jody
>
> Sent from my iPhone
>
> On Aug 11, 2017, at 11:51, "vincent.adrien at gmail.com
> <mailto:vincent.adrien at gmail.com>" <vincent.adrien at gmail.com
> <mailto:vincent.adrien at gmail.com>> wrote:
>
> Hi all,
>
> I agree with Ben that it does not look like jet to me: the
> bright light blue seems to be missing. FWIW, "Spectral"
> (with a capital S) might be the closest colormap among the
> built-in ones in Matplotlib, but it is still more
> “pastel-ish” than Kris´ example.
>
> Best,
> Adrien
>
> On 08/11/2017 11:43 AM, Benjamin Root wrote:
> Not jet, it doesn't go through cyan. Looks more like
> coolwarm, to me, or maybe RdYlGn_r (but the yellow isn't
> right, either...).
> I am also not completely convinced it was made in
> matplotlib. The 3d plot's projection isn't the same as
> mplot3d's projection.
> On Fri, Aug 11, 2017 at 2:34 PM, Jody Klymak
> <jklymak at uvic.ca <mailto:jklymak at uvic.ca>
> <mailto:jklymak at uvic.ca>> wrote:
> __
> Hi Kris,
> That one is called “jet”, though it looks like she
> applied a bit of
> a normalization to it to move the (green) center to
> lower values…
> https://matplotlib.org/users/colormapnorms.html
> <https://matplotlib.org/users/colormapnorms.html>
> <https://matplotlib.org/users/colormapnorms.html
> <https://matplotlib.org/users/colormapnorms.html>> (see
> the last
> subsection: “Two linear ranges”)
> Cheers, Jody
> On 11 Aug 2017, at 11:25, kgb2020 via Matplotlib-users
> wrote:
> Hello everybody,
> I have this figure done by a colleague quite a while ago in
> matplotlib:
> https://image.ibb.co/cxGKSF/tst0.png
> <https://image.ibb.co/cxGKSF/tst0.png>
> <https://image.ibb.co/cxGKSF/tst0.png
> <https://image.ibb.co/cxGKSF/tst0.png>>
> Unfortunately, I no longer have contact with my
> colleague to ask
> the particular colormap she used in matplotlib. I have
> looked
> through the gallery at
> https://matplotlib.org/examples/color/colormaps_reference.html
> <https://matplotlib.org/examples/color/colormaps_reference.html>
> <https://matplotlib.org/examples/color/colormaps_reference.html
> <https://matplotlib.org/examples/color/colormaps_reference.html>>
> but
> I am unable to find that colormap she used there.
> Can anybody recognize the colormap she used in that plot?
> Thank you!
> Best, Kris
> Sent with ProtonMail <https://protonmail.com> Secure Email.
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