Even though widely used, #matlab and #octave ‘s jet colormap is not a good choice for visualizations…

Even though widely used, #matlab and #octave 's jet colormap is not a good choice for visualizations due to poor grayscale conversion, as explained here: http://cresspahl.blogspot.de/2012/03/expanded-control-of-octaves-colormap.html . I suppose its visual appeal lies in the colorfulness, hence many replacements probably lack the multicolored gradient.

The “antijet” colormap is based on the (reverse) visual spectrum, ranging from violet over green to red. Its RGB channels use trigonometric functions (sine and cosine) instead of piecewise linear functions usually utilized. The associated grayscale conversion (channel average) is monotonically increasing and almost linear (slightly sigmoid like). A drawback could be the lower contrast. Check out the channel plot: https://lh3.googleusercontent.com/-16y4VJANqOU/VCC4aXZCToI/AAAAAAAAAR0/L8_pTHKEp5A/w703-h527-no/antijet.png

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