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How to find axes in gui?

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Rafet
Rafet 2014-12-17
编辑： Ahmed Maalej 2019-5-2
Hi,
I'm trying to plot sth on axes2 in a gui, I think first I must find the axes2 and then set it as current axes.
But MATLAB could not find axes2, despite it can find all axes objects in figure.
ax=findobj(gcf,'Tag','axes2')
axes(ax);
What can be the problem?
rft
  3 个评论
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Rafet
Rafet 2014-12-17
Yes, I have two figures opened, but the one including axes2 is the last opened and I assume it is the current figure.
Besides, MATLAB can find all axes in figure with
findall('type','axes')
command, but cannot find axes separately.
By the way I solved the issue by assingning axes handles to global variables.
thanks
muhammad zulhelmy
muhammad zulhelmy 2017-3-5
how can i copy data from axes2, then display to axes3 ??

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回答（2 个）

matt dash
matt dash 2014-12-17
Certain plotting functions, including cla, can reset the axes's tag. As Ben11 says, the better option is to store the handle somewhere permanent (i.e. in the handles structure, which if you're using GUIDE happens automatically) and access it from there.
If you need to rely on findobj, you need to be careful that you don't use any functions that would reset the properties you're using to test with findobj.
Ahmed Maalej
Ahmed Maalej 2019-5-2
编辑：Ahmed Maalej 2019-5-2
I faced the same problem trying to actualise the resulting image after parameter changes. In my case I used more than one figure, and I wanted to display the result on axes of my last figure after a pushbutton:
ok_mask_button= uicontrol(handles.pan,'Style','pushbutton','Units', 'normal', 'Position',[.55 .9 .08 .06],'FontSize',12,'FontWeight','bold', 'String','Ok','Callback', @Mask_parameters);
So to display the image using my callback function, the solution was :
% some code above%
...
ax = gca;
imshow(handles.mask,'Parent',ax)
I needed to use gca to specify that I wanted to work on the current axes.

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