How can I output variables from a handle function passed as param to a set function?

Hello,

I would like to use an output variable generated inside a handle function which is passed as parameter to a set function. I mean, I have a main code (which I haven´t added here so as not to complicate my question). In this main code,I call the function frying_pan_position_keypress(y). Then, when I press the left arrow key, eg, I calculate te variable j, and I would like to pass this variable to the main code.

This is my code:

function j=frying_pan_position_keypress(y)

set(gcf,'KeyPressFcn',{@frying_pan_movement,y});

    function j=frying_pan_movement(scr,event,y)
        switch event.Character
                    case 28
                        j=y-2
                    case 29 
                        j=y+2
                    case 30
                        j=y-10
                    case 31
                        j=y+10
                end
    end
end

Lots of thanks in advance.

Answer 1

[Joseph Cheng]

http://stackoverflow.com/questions/16613252/how-to-use-keypressfcn-in-matlab-with-a-function-already-create I think the stackoverflow thread in the link may help.

edit: did a quick mockup and maybe easiest way is to just create a global variable? Probably not the Best solution.

Answer 2

[Armando Perez]

First of all, I would like to thank you for being so fast at the time to answer my question.

I have already tried to create ''j'' as global variable but it doesn´t work. The ''j'' outside and the ''j'' inside the handle function is a different variable. What I think I need is to be able to get j as an ouput from function set which is the link between the funcion and the handle function.

I have read that help in stackoverflow before but it is only explained how to use and create keyboard interruptions and its handle functions. And it doesn´t explain how to get a variable outside it to be able to use it in a main program.

I'm going to keep in it but any help will be very useful.