How can I read the point coordinates from a graphic?

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Flávio 2013-4-24

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https://ww2.mathworks.cn/matlabcentral/answers/73468-how-can-i-read-the-point-coordinates-from-a-graphic

I want to read the x and y coordinates of a certain point of the graphic when I click in that point. Is there any way to do it?

Sorry for my bad English!

Thanks

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Answer 1

Image Analyst 2013-4-25

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https://ww2.mathworks.cn/matlabcentral/answers/73468-how-can-i-read-the-point-coordinates-from-a-graphic#answer_83409

在 MATLAB Online 中打开

Try ginput:

plot(1:10);
grid on;
uiwait(msgbox('Click a point'));
[x,y] = ginput(1)

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Flávio 2013-4-25

It works. But now I want to use it in a GUI axes. I have a graphic associated with handles.axes1, and I want to do obtain the coordinates. For example, everytime I select a point the coordinates appear in editboxes. The thing is, axes don't have callbacks. So how can I trigger the action? In other words, where do I put the code? Thanks again!

Image Analyst 2013-4-25

Have a button with a captions that says something like "Select a point..." and then call that code (put it in the button callback) when the user clicks the button, which indicates that they are ready to specify a point on the axes.

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