Setting range for each color in the colorscale

Hi,

I have a plot like the attached. I used the following code to get this:

contourf(x,y,chg, 'edgecolor','none');
colorbar;
colormap(jet);

I want to divide the colorscale by seven colors and each color will have different range which is not linear. Such as:

1st color range: -2.5*10^0 to -10^0

2nd color range: -10^0+0.0001 to -10^-1

3rd color range: -10^-1+0.0001 to -10^-2

4th color range: -10^-2+0.0001 to 10^-2

5th color range: 10^-2+0.0001 to 10^-1

6th color range: 10^-1+0.0001 to 10^-0

7th color range: 10^-0+0.0001 to 2.5*10^-0

Can anyone help me with it? Thanks!

Answer 1

[Walter Roberson]

https://www.mathworks.com/matlabcentral/answers/232457-how-to-create-and-use-mixed-colormaps-associated-to-positive-and-negative-data-values#answer_188643

https://www.mathworks.com/matlabcentral/answers/377542-how-can-i-change-number-on-colorbar-caxis#answer_300478