Colorbar with three colors

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Yunhui He
Yunhui He on 3 Oct 2017
Answered: KSSV on 3 Oct 2017
I am using surf plot the pictures. I want to see the colorbar at the right-hand side. But the transition of the color is not so obvious. I want to see from green to red, and there is another color in the middle. How can I do this?
Thanks!
  1 Comment
Walter Roberson
Walter Roberson on 3 Oct 2017
Are there only 3 colors in the plot, or is it that you only want three colors to appear in the colorbar ?
If you are already doing colormap() in order to activate a colormap of three colors, then colorbar() should adjust automatically.

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Accepted Answer

KSSV
KSSV on 3 Oct 2017
Z = peaks(100) ;
surf(Z)
shading interp
cmap = [1 0 0 ; 0 1 0 ; 0 0 1] ;
colorbar
colormap(cmap)

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