Increment a variable every time a push button is pressed:

Greetings.

If I want to create a simple GUI which contains only one push button, and each time I press this push button I want a variable x to be increased by 1, how can I do that in MATLAB? I have worked with simple GUIs but I am not that professional. (Please note that I want the variable x to increase, not a display in the interface itself.)

Thanks in advance.

Regards.

[Walter Roberson]

Where does the variable x "live" ? Which workspace is it in?

[Mohammad Ayoub]

I wanna define it in the GUI itself, x = 0 in the GUI opening function

[Rik]

In the callback you can load and save data with guidata, so make x a field in that struct and you can easily do this.

[Walter Roberson]

In MATLAB, a GUI is technically a MATLAB figure() . Could you confirm that you want to associate the value x with a figure "somehow" ?

Answer 1

[Walter Roberson]

http://matlab.wikia.com/wiki/FAQ#How_can_I_share_data_between_callback_functions_in_my_GUI.28s.29.3F

Answer 2

[Jan]

This is such easy, that GUIDE is not needed.

function FigH = CreateTheGUI
FigH      = figure;
handles.X = 0;
handles.button = uicontrol('Style', 'PushButton', 'String', 'Increase X', ...
             'Units', 'normalized', 'Position', [0.1, 0.1, 0.8, 0.1], ...
             'FontSize', 20, 'Callback', @buttonCB);
guidata(FigH, handles);
end

function buttonCB(ButtonH, EventData)
handles   = guidata(ButtonH);
handles.X = handles.X + 1;
guidata(ButtonH, handles);
end

Now call this e.g. from the command line:

FigH = CreateTheGUI;

Press the button how often you want and obtain the current value:

handles = guidata(FigH);
disp(handles.X)