How to change colorbar's color (in some particular value interval)?

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chia hua
chia hua on 2 Jun 2013
Answered: Makarand on 27 Apr 2018
Hi , I want to change colorbar's color in some particular value interval.
For example , I likes the jet colorbar , link is my figure, but I want to
let the value between -0.5~ 0.5 to become white color, how can I do this?
thank you much !!

Accepted Answer

Walter Roberson
Walter Roberson on 2 Jun 2013
You need to create a new colormap that has the appropriate colors in the appropriate range.
It appears that you have your plot set up to automatically map your minimum data to the lowest color, and your maximum data to the highest color.
I estimate that the range you want to change is roughly 2/3 of the way to the highest color as your range looks like -4 to +2 .
So you need to use something like
newmap = jet; %starting map
ncol = size(newmap,1); %how big is it?
zpos = 1 + floor(2/3 * ncol); %2/3 of way through
newmap(zpos,:) = [1 1 1]; %set that position to white
colormap(newmap); %activate it
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More Answers (2)

Amith Kamath
Amith Kamath on 2 Jun 2013
You can manually change the colormap, using COLORMAPEDITOR:
Double click on the color markers below the spectrum displayed, and choose the color you want to display that range of data in, using the color picker.

Makarand
Makarand on 27 Apr 2018
google Recolor_pcolor

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