MATLAB: How to pass a value out of a GUI when button is pressed? The value must be available to another m file

guidematlab gui

Hello,

I am making a GUI which adds rows to a matrix in one part. I want the matrix to be available to another m-file when I press another button (export). I've been looking at this for two weeks and can't figure it out. What is the syntax to make this matrix available to another function? eg x = function (y, exported_matrix). The normal [export_matrix] =Callback_pushbutton(….) doesn't work for GUI's. Can someone explain this? Sorry, this is probably basic but I can't see by any examples how this would work with my own GUI.

Thanks,

Brian

Best Answer

For reference to anyone with the same problem: Use global. It may or not be bad programming practivce but it works. global has to be stated in BOTH m files.

eg.

m-file 1

global BND_CDN
...

in m-file 2:

global BND_CDN
a = BND_CDN etc.

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MATLAB: H i every one , i need to declare a counter such that if any one of the four buttons is pressed a specefic funtion specified in the fifth button is performed.Suppose UserData can not be used it reserved for something else

Use guidata, which calls setappdata and getappdata internally:

function pushbutton1_Callback(hObject, eventdata, handles)
handles = guidata(hObject);
handles.counter = 1;
guidata(hObject, handles);
% And the same for the other callbacks...
function pushbutton5_Callback(hObject, eventdata, handles)
handles = guidata(hObject);
switch handles.counter
  case 1
  case 2
  case 3
  case 4
  otherwise  % No SWITCH without OTHERWISE
    error('Programming error')
  end
end

MATLAB: Error using handle.handle/set Invalid or deleted object.

In your callback for edit1 you replace the handle with the value extracted from the handle. That is confusing at the very least.

Best Answer

Related Solutions

MATLAB: H i every one , i need to declare a counter such that if any one of the four buttons is pressed a specefic funtion specified in the fifth button is performed.Suppose UserData can not be used it reserved for something else

MATLAB: Error using handle.handle/set Invalid or deleted object.

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