set color in contour plot with specified colormap

I have a contour plot with only two value (3 and 5 for example), thus it should appear only two colors.

but I have a colormap with 6 values: cmb=jet(6);

I have plot the contour using command: [xc,yc]=contourf(X,Y,Z);

I want color the contour having value 3 with cmb(3,:), and color the contour having value 5 with cmb(5,:), is it possible to do this?

Thanks!

Yu

[jonas]

Why dont you build the cmap with only those two rgb triplets?

[Yu Li]

because I have a lot of contours need to be plot.

some have color 1,2, some have color 3,4, in order to make the colors consistent for all figures, i need to prescribe a colormap.

[jonas]

Aha, I am not 100% sure what you want to do, but Im guessing you could achieve it by playing around with the clim

[Yu Li]

not sure if this works. I will try to provide a test file.

[jonas]

If you use the same limits for the cbar in every plot, then you can make comparisons between graphs using a single cbar.

[Yu Li]

I tried to use the same limits for the colorbar, but the problem still exist. I post another topic here:

https://www.mathworks.com/matlabcentral/answers/422448-contourf-plot-different-display-problem

if you are interested could you please take a look?

Thanks!

Yu

Answer 1

[ANKUR KUMAR]

clc
clear
contourf(randi(6,5,5))
colormap(jet(5))
colorbar