Hi,
> On 5 Jun 2015, at 11:17 AM, Sourish Basu <sourish.b...@gmail.com> wrote:
>
> On 06/05/2015 10:17 AM, Jody Klymak wrote:
>> Anyways, I guess I am advocating trying to find a colormap with a very
>> obvious central hue to represent zero. Anomaly data sets are *very* common,
>> so having a default colormap that doesn’t do something reasonable with them
>> may be a turn off to new users.
>
> I agree that jet does a bad job with anomaly data, but I disagree that having
> a diverging colormap as default (or even a "diverging" argument to anything
> that takes a cmap value) would solve that. Very often the "zero" of an
> anomaly is not at the center of the extrema, and requires creating a custom
> diverging colormap anyway (see attached example).
Well, I *strongly* disagree with that attached example! It makes it look like
-0.5 is equivalent to +1.5! Unless there is a really strong reason to do that,
I think that is poor practice as it makes your negative anomalies look far
stronger than your positive, and that is not the case in the underlying numbers.
Cheers, Jody
> OT, I recently found a nice alternative to jet
> here:https://mycarta.wordpress.com/2014/11/13/new-rainbow-colormap-sawthoot-shaped-lightness-profile/
>
> <https://mycarta.wordpress.com/2014/11/13/new-rainbow-colormap-sawthoot-shaped-lightness-profile/>
> It takes care of my biggest crib with jet, which is that there is not enough
> perceptual variation in the middle of the range.
>
> Cheers,
> Sourish Basu
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--
Jody Klymak
http://web.uvic.ca/~jklymak/
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