create a gui to display x on the button when clicked in matlab

To create a GUI to display "x" on a button when clicked in MATLAB, you can follow these steps:

1. Create a new GUI window using the "figure" command
2. Add a "uicontrol" to the GUI using the "uicontrol" command with the "style" property set to "pushbutton"
3. Set the "string" property of the "uicontrol" to be initially empty
4. Set a "callback" function for the "uicontrol" using the "callback" property
5. In the callback function, set the "string" property of the "uicontrol" to be "x"

Here's an example code snippet that demonstrates these steps:

main.m
function mygui
   % Create the GUI window
   fig = figure;
   
   % Add a pushbutton uicontrol to the GUI
   btn = uicontrol('Style', 'pushbutton', 'String', '', ...
                   'Position', [100 100 50 50], 'Callback', @btnCallback);
   
   function btnCallback(hObject, eventdata)
       % Set the string property of the button to "x"
       set(hObject, 'String', 'x');
   end
end
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In this example, the "btnCallback" function is triggered when the button is clicked, and it sets the "String" property of the button to "x".