Scaleable, draggable box on plots that can select data

Question

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

Accepted Answer

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.

Scaleable, draggable box on plots that can select data

Solution

Problem