How to set specific values in an array to a certain color when using imagesc?
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I have an array that is 100x100 filled with zeros. I want to set some cells to other values and have the cell change colour depending on the value.
i want cells that have a value of 1 to be green, a value 2 to be white, 3 to be brown and 0 to be blue.
how would i do this?
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Answers (1)
Miriam
on 20 Nov 2018
You can define your own colormap as follows:
x = randi([0 3],10,10);
colors = [0 0 1;... % blue for 0
0 1 0;... % green for 1
1 1 1;... % white for 2
0.65 0.16 0.16]; % brown for 3, etc.
figure;
imagesc(x);
colormap(colors);
2 Comments
Selva Kumar
on 20 Mar 2020
When there is no '1' or '2' in the matrix 'x', then this colormap doesnot work as intended.
Any solution for this issue ?
Stephen23
on 20 Mar 2020
"Any solution for this issue ?"
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