Matrix values represented as colormap
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Hi everyone,
I am trying to represent the values of a matrix as a colormpap. The problem I am currently having is that this matrix does not have any negative values and I'd like my "colorbar" to represent this as well without altering the way the colormap currelty looks. I'd like my color bar to go from 0 to max(E_superimposed) but when I chnage the "caxis" the colormap gets all distorted. This is the image I am getting from my code: Thank you so much in advance
figure(3)
colormap(flipud(colormap));
set(gcf, 'PaperPosition', [0 0 8 5]);
set(gcf, 'PaperSize', [8 5]);
imagesc(E_superimposed);
caxis([-max(E_superimposed(:)) max(E_superimposed(:))])
colorbar
colormap(lbmap(201,'RedWhiteBlue'))
set(gca,'XTick',[])
set(gca,'YTick',[])
title('Superimposed Block Matrix')
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/629260/image.png)
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Image Analyst
am 25 Mai 2021
Try
imagesc(E_superimposed);
caxis([0, max(E_superimposed(:))]) % Ignore negative values.
or maybe
cmap = lbmap(201,'RedWhiteBlue')
imshow(E_superimposed, [], 'Colormap', cmap); % Don't use caxis after this.
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