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How about "pythonic sunset" ?

On Sun, Apr 5, 2015 at 2:01 PM Benjamin Root <ben...@ou...> wrote:

> That is nice. The blue is a bit heavy, but that might be my display. Now,
> how should we order it by default? I am used to thinking of blues as lower
> values, and reds as higher. The yellow at the end throws me off a bit,
> because I would think of it as a "weaker" color. Maybe if it was more
> gold-like?
>
> We should also start thinking of a snazzy name. BlRdYe probably won't cut
> it.
>
> Ben Root
> On Apr 5, 2015 3:21 AM, "Nathaniel Smith" <nj...@po...> wrote:
>
>> On Mon, Feb 23, 2015 at 10:46 AM, Eric Firing <ef...@ha...> wrote:
>> > On 2015/02/18 2:39 PM, Nathaniel Smith wrote:
>> >>
>> >> On Feb 16, 2015 3:39 PM, "Eric Firing" <ef...@ha...> wrote:
>> >>>
>> >>>
>> >>> On 2015/02/16 1:29 PM, Michael Waskom wrote:
>> >>>
>> >>>> Nathaniel's January 9 message in that thread (can't figure out how to
>> >>>> link to it in the archives) had a suggestion that I thought was very
>> >>>> promising, to do something similar to Parula but rotate around the
>> hue
>> >>>> circle the other direction so that the hues would go blue - purple -
>> red
>> >>>> - yellow. I don't think we've seen an example of exactly what it
>> would
>> >>>> look like, but I reckon it would be similar to the middle colormap
>> here
>> >>>>
>> >>>>
>> http://earthobservatory.nasa.gov/blogs/elegantfigures/files/2013/08/three_perceptual_palettes_618.png
>> >>>> (from the elegant figures block series linked above), which I've
>> always
>> >>>> found quite attractive.
>> >>>
>> >>>
>> >>> Certainly it can be considered--but we have to have a real
>> >>> implementation.
>> >>
>> >>
>> >> While I hate to promise vaporware, I actually was planning to have a
>> >> go at implementing such a colormap in the next few weeks, based on
>> >> optimizing the same set of parameters that viscm visualizes... FWIW.
>> >
>> >
>> > It might be worth quite a bit--and the sooner, the better.
>>
>> While it's taking longer than hoped, just to reassure you that this
>> isn't total vaporware, here's a screenshot from the colormap designer
>> that Stéfan van der Walt and I have been working on... still needs
>> fine-tuning (which at this point probably won't happen until after I
>> get back from PyCon), but we like what we're seeing so far :-)
>>
>> The colormap shown has, by construction, perfect lightness linearity
>> and perfect perceptual uniformity, according to the better-than-CIELAB
>> model used by the viscm tool I linked upthread.
>>
>> --
>> Nathaniel J. Smith -- http://vorpus.org
>>
>>
>> ------------------------------------------------------------------------------
>> Dive into the World of Parallel Programming The Go Parallel Website,
>> sponsored
>> by Intel and developed in partnership with Slashdot Media, is your hub
>> for all
>> things parallel software development, from weekly thought leadership
>> blogs to
>> news, videos, case studies, tutorials and more. Take a look and join the
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>>
>> ------------------------------------------------------------
> ------------------
> Dive into the World of Parallel Programming The Go Parallel Website,
> sponsored
> by Intel and developed in partnership with Slashdot Media, is your hub for
> all
> things parallel software development, from weekly thought leadership blogs
> to
> news, videos, case studies, tutorials and more. Take a look and join the
> conversation now. http://goparallel.sourceforge.net/
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>

That is nice. The blue is a bit heavy, but that might be my display. Now,
how should we order it by default? I am used to thinking of blues as lower
values, and reds as higher. The yellow at the end throws me off a bit,
because I would think of it as a "weaker" color. Maybe if it was more
gold-like?

We should also start thinking of a snazzy name. BlRdYe probably won't cut
it.

Ben Root
On Apr 5, 2015 3:21 AM, "Nathaniel Smith" <nj...@po...> wrote:

> On Mon, Feb 23, 2015 at 10:46 AM, Eric Firing <ef...@ha...> wrote:
> > On 2015/02/18 2:39 PM, Nathaniel Smith wrote:
> >>
> >> On Feb 16, 2015 3:39 PM, "Eric Firing" <ef...@ha...> wrote:
> >>>
> >>>
> >>> On 2015/02/16 1:29 PM, Michael Waskom wrote:
> >>>
> >>>> Nathaniel's January 9 message in that thread (can't figure out how to
> >>>> link to it in the archives) had a suggestion that I thought was very
> >>>> promising, to do something similar to Parula but rotate around the hue
> >>>> circle the other direction so that the hues would go blue - purple -
> red
> >>>> - yellow. I don't think we've seen an example of exactly what it would
> >>>> look like, but I reckon it would be similar to the middle colormap
> here
> >>>>
> >>>>
> http://earthobservatory.nasa.gov/blogs/elegantfigures/files/2013/08/three_perceptual_palettes_618.png
> >>>> (from the elegant figures block series linked above), which I've
> always
> >>>> found quite attractive.
> >>>
> >>>
> >>> Certainly it can be considered--but we have to have a real
> >>> implementation.
> >>
> >>
> >> While I hate to promise vaporware, I actually was planning to have a
> >> go at implementing such a colormap in the next few weeks, based on
> >> optimizing the same set of parameters that viscm visualizes... FWIW.
> >
> >
> > It might be worth quite a bit--and the sooner, the better.
>
> While it's taking longer than hoped, just to reassure you that this
> isn't total vaporware, here's a screenshot from the colormap designer
> that Stéfan van der Walt and I have been working on... still needs
> fine-tuning (which at this point probably won't happen until after I
> get back from PyCon), but we like what we're seeing so far :-)
>
> The colormap shown has, by construction, perfect lightness linearity
> and perfect perceptual uniformity, according to the better-than-CIELAB
> model used by the viscm tool I linked upthread.
>
> --
> Nathaniel J. Smith -- http://vorpus.org
>
>
> ------------------------------------------------------------------------------
> Dive into the World of Parallel Programming The Go Parallel Website,
> sponsored
> by Intel and developed in partnership with Slashdot Media, is your hub for
> all
> things parallel software development, from weekly thought leadership blogs
> to
> news, videos, case studies, tutorials and more. Take a look and join the
> conversation now. http://goparallel.sourceforge.net/
> _______________________________________________
> Matplotlib-devel mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-devel
>
>

On Sun, Apr 5, 2015 at 12:46 AM, Eric Firing <ef...@ha...> wrote:
> On 2015/04/04 9:20 PM, Nathaniel Smith wrote:
>
>> While it's taking longer than hoped, just to reassure you that this
>> isn't total vaporware, here's a screenshot from the colormap designer
>> that Stéfan van der Walt and I have been working on... still needs
>> fine-tuning (which at this point probably won't happen until after I
>> get back from PyCon), but we like what we're seeing so far :-)
>>
>> The colormap shown has, by construction, perfect lightness linearity
>> and perfect perceptual uniformity, according to the better-than-CIELAB
>> model used by the viscm tool I linked upthread.
>>
>
> Thanks for the update, and the progress.  The example colormap looks
> promising as a viable alternative.  It appears to have good contrast. How
> well does this type of map work with the colorblindness filters?

Blue/yellow contrast is preserved with the common types of
colorblindness, so it should become a smooth ramp of blue ->
(reddish/greyish, depending on details/severity of color deficiency)
-> yellow. And the luminance remains linear. So it's definitely not a
disaster.

Beyond that I'm not entirely sure how to numerically quantify
perceptual uniformity for colorblind users -- we could use the
sRGB->sRGB formulas for simulating colorblindness for non-colorblind
viewers and then use the regular non-colorblind uniformity estimates,
but I have no idea how accurate that would be... my guess though is
that the way that colormaps is designed ATM it will have somewhat
faster hue shifts in the lower (blue) region than the upper (yellow)
region, and fastest in the middle, though this effect shouldn't be
huge (and to some extent is inevitable with any map that's both
colorful and perceptually uniform for non-colorblind users). Thinking
through these details is one of the things I had in mind when I
mentioned "fine tuning" above though :-).

We'd welcome any feedback from readers with non-simulated color deficiency!

-n

-- 
Nathaniel J. Smith -- http://vorpus.org

<3 <3 <3 Love the prototype colormap!!!

On 2015/04/04 9:20 PM, Nathaniel Smith wrote:

> While it's taking longer than hoped, just to reassure you that this
> isn't total vaporware, here's a screenshot from the colormap designer
> that Stéfan van der Walt and I have been working on... still needs
> fine-tuning (which at this point probably won't happen until after I
> get back from PyCon), but we like what we're seeing so far :-)
>
> The colormap shown has, by construction, perfect lightness linearity
> and perfect perceptual uniformity, according to the better-than-CIELAB
> model used by the viscm tool I linked upthread.
>

Thanks for the update, and the progress.  The example colormap looks 
promising as a viable alternative.  It appears to have good contrast. 
How well does this type of map work with the colorblindness filters?

Eric

On Mon, Feb 23, 2015 at 10:46 AM, Eric Firing <ef...@ha...> wrote:
> On 2015/02/18 2:39 PM, Nathaniel Smith wrote:
>>
>> On Feb 16, 2015 3:39 PM, "Eric Firing" <ef...@ha...> wrote:
>>>
>>>
>>> On 2015/02/16 1:29 PM, Michael Waskom wrote:
>>>
>>>> Nathaniel's January 9 message in that thread (can't figure out how to
>>>> link to it in the archives) had a suggestion that I thought was very
>>>> promising, to do something similar to Parula but rotate around the hue
>>>> circle the other direction so that the hues would go blue - purple - red
>>>> - yellow. I don't think we've seen an example of exactly what it would
>>>> look like, but I reckon it would be similar to the middle colormap here
>>>>
>>>> http://earthobservatory.nasa.gov/blogs/elegantfigures/files/2013/08/three_perceptual_palettes_618.png
>>>> (from the elegant figures block series linked above), which I've always
>>>> found quite attractive.
>>>
>>>
>>> Certainly it can be considered--but we have to have a real
>>> implementation.
>>
>>
>> While I hate to promise vaporware, I actually was planning to have a
>> go at implementing such a colormap in the next few weeks, based on
>> optimizing the same set of parameters that viscm visualizes... FWIW.
>
>
> It might be worth quite a bit--and the sooner, the better.

While it's taking longer than hoped, just to reassure you that this
isn't total vaporware, here's a screenshot from the colormap designer
that Stéfan van der Walt and I have been working on... still needs
fine-tuning (which at this point probably won't happen until after I
get back from PyCon), but we like what we're seeing so far :-)

The colormap shown has, by construction, perfect lightness linearity
and perfect perceptual uniformity, according to the better-than-CIELAB
model used by the viscm tool I linked upthread.

-- 
Nathaniel J. Smith -- http://vorpus.org