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Editorial Team
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Asked: 2026-06-05T11:50:09+00:00

Here’s the setup: I’ve got a graphical plot of data, and I’m trying to

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Here’s the setup:

I’ve got a graphical plot of data, and I’m trying to find if it’s feasible to try to put a box on the figure that can be moved and changed in width and return some values like percentage of and area under the curve. It looks something like this:

Example

Any suggestions on where to start? My feeling was that it might be doable using a more GUI’d interface versus a standard plot.

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1 Answer

  1. Editorial Team

    I would start with imrect. It is draggable, and you can add callbacks to it.

    (Taken directly from MATLAB help)

    figure, imshow('cameraman.tif');
h = imrect(gca, [10 10 100 100]);
addNewPositionCallback(h, @(p) title(mat2str(p, 3)));
fcn = makeConstrainToRectFcn('imrect', get(gca,'XLim'), get(gca, 'YLim'));
setPositionConstraintFcn(h, fcn);

    Change the addNewPositionCallback to something that suits your needs. Specifically, get the needed pixels from the image (by using the position), and calculate whatever you like.

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