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Overlay imagesc and contour in subplot with different colour bars

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Hugo Fortescue
Hugo Fortescue on 17 Mar 2021
Edited: Adam Danz on 22 Mar 2021
Hi All,
I have an image i would like to produce as part of an array of 6, and I have the following code:
Unwrap = subplot(2,3,5);
hold on
imagesc(G_Unwrapped); title('Phase Change');colorbar, axis square
colormap(Unwrap,'gray')
contour(G_Unwrapped, 'ShowText','on');
hold off
However, as the axis handle applies to the whole subplot, and not the indervidual plot commands I can't think of a way to apply a second colour map too the contour plot.
Many thanks in advanced for any help!

Accepted Answer

Adam Danz
Adam Danz on 17 Mar 2021
Edited: Adam Danz on 17 Mar 2021
> the axis handle applies to the whole subplot, and not the indervidual plot commands
That's correct. A workaround is to assign two overlapping axes with care so that the axes are linked.
Follow this demo that carefully overlays imagesc and contour
You can easily add two independent colobars to the example above following this similar example,
Give it a shot and if you get stuck, show us what you've got and I can nudge you in the right direction.
  2 Comments
Adam Danz
Adam Danz on 18 Mar 2021
This line doesn't make sense. Wrap is the axis handle.
ax1 = axes(Wrap);
The first 3 lines in the first link in my answer should look like this for subplots,
fig = clf();
ax1 = subplot(___);
ax2 = copyobj(ax1,fig);
% then continue with the demo in the link
I tested that full solution using subplots in r2021a and it works well.

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