Re: [matplotlib-devel] release strategy and the color revolution

[Nathaniel S. <nj...@po...>]

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