4 ms·
> Jet is effectively a divergent colormap I wouldn't describe a rainbow colormap as divergent. A divergent colormap transitions from one color to another, wit
by jamessb 6y ago
> Jet is effectively a divergent colormap
I wouldn't describe a rainbow colormap as divergent.
A divergent colormap transitions from one color to another, with neutral color in the middle (e.g., from blue to red, passing through white). A rainbow color map transitions between a series of spectrally-orderd distinct colors (red, orange, yellow, green, blue, indigo, violet); this gives rise to apparent discontinuities (e.g. [0]).
If you want a divergent color scheme to highlight the extreme values, then use one (see, e.g. [1]) rather than a rainbow scheme.
[0]: http://sci.utah.edu/~vdl/papers/2019_eurovis_implicit-discretization.pdf http://sci.utah.edu/~vdl/papers/2019_eurovis_implicit-discre...
[1]: https://www.kennethmoreland.com/color-maps/ https://www.kennethmoreland.com/color-maps/
- blix 6y agoNot all rainbows are divergent, but if you look at jet you can clearly see it's designed to be roughly symmetric about the mean. Rainbow and divergent are not mutually exclusive.
- wongarsu 6y agoJet transitions from red to blue, with green as a neutral color in the middle. It happens to transition through yellow and cyan to give more possible shades (~more resolution). It's a bad color map for various reasons, but I think it's perfectly fair to call it divergent.