MATLAB: Is it possible to create multiple functions and calling them in one .m file

callgui

I have a question about calling a function in Gui. Here is an example of my code:

   function pushbutton1_Callback(hObject, eventdata, handles)
   ABC = handles.Murthy(result);      %%????? This line
   %button implementation
   function maxmax = Murthy (result)
   %Murthy implementation

The function Murthy also contains "axes(handles.axes1);" etc. How to call function Murthy without deleting gui control codes (like "axes(handles.axes1)" etc) from it? Thanks in advance!

Best Answer

Generically, this is the process:

 function whee = whatevs(a,b,c) %1st line of m file
 whee = alpha(a) + beta(b) + gamma(c);
 end
 function a = alpha(x) %still in the whatevs.m



  a = x.^2;
 end
 function b = beta(x) %still in the whatevs.m
  b = 2.^x;
 end
 function c = gamma(x) %still in the whatevs.m
  c = x^x;
 end

You can also "nest" functions: eg, gamma could be:

 function c = gamma(x) %still in the whatevs.m
  c = banana^x;
  function b = banana
   b = randn*5;
  end
 end

Related Solutions

MATLAB: Trouble with function called from a GUI callback fonction

Claude - look closely at the order in which handles is updated. The

 function CallbackFunction(hObject, eventdata, handles)

is called passing in the latest (at the time) version of handles. This parameter (along with the other two) are passed in to your function

 function myFunction(hObject, eventdata, handles)

where the code updates the handles object and then saves it using

 guidata(hObject, handles);

But then we return back to your CallbackFunction and maybe do something, and then calls

 guidata(hObject, handles);

But which version of handles is this? This is the copy that was passed into this function when CallbackFunction was called. It is not the updated version from your call to myFunction since myFunction does not return the updated handles structure, and your code probably doesn't refresh handles (after this call to myFunction) with

 handles = guidata(hObject);

So you can do at least two different things - return the updated handles structure from myFunction by changing its signature to

 function [handles] = myFunction(hObject, eventdata, handles);

and so your code would become something like

 function CallbackFunction(hObject, eventdata, handles) 
 ...
 handles = myFunction(hObject, eventdata, handles);
 ...
 guidata(hObject, handles);   % in case you've updated handles again

 end % function

Or you can refresh your local copy as

 function CallbackFunction(hObject, eventdata, handles) 
 ...
 myFunction(hObject, eventdata, handles);
 handles = guidata(hObject);
 ...
 guidata(hObject, handles);   % in case you've updated handles again
 end % function

Hopefully, one of the above solutions will work for you!

MATLAB: How to call a function (another .m file) in MATLAB GUI

When you get an error message, it is a good idea, to post it here. Posting the relevant part of the code allows us to understand what happens.

"handles." is not an operator, but a struct.

Best Answer

Related Solutions

MATLAB: Trouble with function called from a GUI callback fonction

MATLAB: How to call a function (another .m file) in MATLAB GUI

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