How to determine if an axes already has a colorbar?

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David K
David K 2024-3-5
回答： Voss 2024-3-5
I would like to determine if an axes already has a colorbar. I have code which plots many objects on the same axes, but I only want to create and define the colorbar once to make things more efficient. I've tried looking for a ColorBar object as a child of the figure handle, but I have multiple subplots in the same figure, and each may or may not need their own colorbar. Is there a way to determine if a particular axes has a colorbar associated with it?

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Voss
Voss 2024-3-5
Ran in:
There is a hidden axes property called 'Colorbar', which you can use.
% two axes, one with colorbar, one without
ax = subplot(2,1,1);
plot(1:10)
colorbar()
ax(2) = subplot(2,1,2);
plot(1:10)
ax1_has_colorbar = ~isempty(ax(1).Colorbar)
ax1_has_colorbar = logical
1
ax2_has_colorbar = ~isempty(ax(2).Colorbar)
ax2_has_colorbar = logical
0
Reference: https://www.mathworks.com/matlabcentral/answers/234652-how-do-i-find-the-handle-to-the-colorbar-for-a-specific-axes

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