How do I find the handle to the colorbar for a specific axes

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jvc
jvc on 19 Aug 2015
Edited: Matt J on 18 Mar 2022
I would like to know how to programatically find the handle to the colorbar for a specific axis in a figure which contains several subplots which each of which might or might not have an associated colorbar. Since colorbars are children of the figure it is not obvious to me how I get the handle of the correct colorbar. I can easily get a list of all of the colorbar handles, but I do not see any property value which indicates which bar goes with which axis.

Answers (2)

Morteza
Morteza on 19 Aug 2015
use the specific term for each color bar before making them like:
t = colorbar('peer',gca,'Tag','colorbar1');
get(t)
  2 Comments
Michael G. Baker
Michael G. Baker on 27 Nov 2018
C = findall(gcf,'type','ColorBar');
if isempty(C)
display('No ColorBar.');
end
ColorBars are apparently children of the Figure object, rather than the Axes. I'm not sure how Matlab keeps the colorbars associated with the relevant axes, though. If I need to modify positions and settings later on, I set the object Tags to the same value and use the findall command.

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Matt J
Matt J on 17 Mar 2022
Edited: Matt J on 18 Mar 2022
Here is an excruciatingly roundabout method.
function [Hcb,tf]=getColorbars(hAxes)
%Return colorbar handles for axes with colorbars, and optionally a logical
%indicator array telling which axes have colorbars.
%
%IN:
%
% hAxes: an array of axes handles
%
%OUT:
%
% Hcb: an array of colorbar handles corresponding to the elements of
% hAxes. If hAxes(i) has no colorbar, then Hcb(i) will be
% an empty GraphicsPlaceHolder.
%
% tf: a logical array indicating which elements of hAxes have
% colorbars.
Hcb=gobjects(size(hAxes));
tf=false(size(hAxes));
N=numel(Hcb);
for i=1:N
Hfig=ancestor(hAxes(i),'figure');
before=numel(findobj(Hfig,'Type','colorbar'));
colorbar(hAxes(i),'off');
after= numel(findobj(Hfig,'Type','colorbar'));
if after<before %colorbar was present
Hcb(i)=colorbar(hAxes(i));
tf(i)=1;
end
end
end

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