Use ButtonDownFcn on an image

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J.S. 2018-7-9

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评论： J.S. 2018-7-11

I have a (pixelated) image that has been created from an array of data using the function imagesc(). I would like to click on a pixel and be able to a)obtain the coordinates of the pixel in the figure window, and b)pass these values to a piece of code (to be created) which "finds" what the data values at those coordinates were, and displays the data values in a new figure window. Is such an extraction method, where I am not,say,clicking on a line or axis of a bar graph, possible using the ButtonDownFcn?

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Adam 2018-7-11

I would use functions rather than scripts, but scripts do at least allow nested functions now so you can create your callback as a function at the bottom of your script, to do whatever you want it to with the 'CurrentPoint'.

This function will be called every time you click on whatever you have attached it to, so if this is the axes (assuming you have turned the hittest of the image off) then each time you click the axes the function will trigger so no loops should be needed.

J.S. 2018-7-11