changing the plot in GUI manually -

I have a GUI that plots a curve, and using a peak finder function it finds all the local minima and maxima in the plot and plots X in those points in the graph.

is it possible for the user to change the location of the X points manually using the mouse cursor on the figure?

How can I erase or add manually (not in the code) Xes in the plot in the maxima and minima?

can I somehow drag an X that was plotted, if I see it should be a little to the left i.e...?

Answer 1

[Arthur]

Doug has a great movie on exactly this subject:

http://blogs.mathworks.com/pick/2008/05/27/advanced-matlab-capture-mouse-movement/