gui function from file in matlab

To call a GUI function from a file in MATLAB, you need to create a callback function that invokes the GUI function. The callback function can be defined in a separate file or within the same file as the GUI function. Here's an example of how to create a callback function that calls a GUI function:

main.m
function myCallback(hObject, eventdata, handles)
    % hObject    handle to the calling object (not used here)
    % eventdata  reserved - to be defined in a future version of MATLAB
    % handles    structure with handles and user data (not used here)

    % Call the GUI function
    myGUIFunction();
end
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In this example, myGUIFunction() is the name of the GUI function that you want to call. The callback function takes three arguments, but only hObject is used in this case. You can use the other two arguments to pass additional data to the callback function if necessary.

Once you've defined the callback function, you need to associate it with a GUI object. This can be done using the Callback property of the object. Here's an example of how to associate the callback function with a button object:

main.m
% Create a button object
myButton = uicontrol('Style', 'pushbutton', ...
                     'String', 'Call myGUIFunction', ...
                     'Callback', @myCallback);
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In this example, myButton is the handle to the button object. The Callback property is set to @myCallback, which tells MATLAB to call the myCallback function when the button is clicked.

Note that the GUI function and the callback function must be in the MATLAB search path in order for this to work.