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The jet colormap is horrible, I hate it with a passion, and I know its deficiencies when compared with properly designed colormaps. But I use it all the time. In certain fields (eg FEM applied to mechanical engineering), it's just one of those absolutely counterproductive standards we have to deal with all the time.

Sometimes I have tried using side-by-side figures with other colormap, usually to prove some specific point, but changing the habits of a whole field is really difficult. It is even more difficult when there is not a clear alternative, but several to choose from; I have seen a few other people using alternative colormaps too and they did not use the same as me (or I did not use the same as them).

To give a more extreme example: if a doctor has to check my cancer tests and he has been diagnosing tumors using the jet colormap for decades, I would not feel comfortable if my results were given to him using the much better cividis colormap.




That is why many prefer viridis.


What do you mean by "that"?




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