Interactive Plot that returns a value

Hello,

I wanted to know how to create a "interactive" plot in matlab in which the program pauses while the graph is displayed and user has to select a certain value in the graph, then the program continues execution with the value chosen by the user.

Answer 1

[Adam Danz]

Check out ginput() and let us know if you have any quesitons or problems.

[Harish Rajan]

is it possible to get the array index of the chosen variable instead of the actual x and y coordinates ?

[Adam Danz]

Yes, with a little bit of code.

Presumably you have the (x,y) coordinates of each point. Use pdist2() to compute the distance of each point from the selected coordinate. The point you selected is the one with the minimum distance.

Note that if your points are tightly clustered you may run into precision issues.

If you have any problems, share the relevant parts of the code and I'd be glad to help you out.

[Harish Rajan]

Thank you, i will try this solution !

[Adam Danz]

Ok, i'll be here if you get stuck.