how to use ginput to crop a data?

Hi. I am using guide gui and generating a graph from a certain data. Now I am trying to cut a section of that graph and do an fft on it. Can anyone tell me how to use the ginput function to crop or select the range i want for the fft? because the data is too big.

[Mukul Rao]

Hi,

Here is an examples that demonstrates the use of "ginput" for cropping data.

Crop image data with ginput

You could also consider using the function rbbox