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Ronan
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Is there a way to run a function every time Matlab returns to its command prompt

Asked by Ronan
on 20 May 2011
I would like to install a function that would run every time any other function has completed.
This might be a bit like "startup.m" but would run every time the command prompt is shown instead of at startup. I know Matlab runs "rehash.m" in this manner so maybe there is a way to add more fcns to run at this time.
Is there a way to do this?
Thanks
Ronan

  2 Comments

I have a function which tracks usage of my other functions.
It does a much more comprehensive dependency analysis than is possible by code analysis. I would like this function to be able to know when all other functions have finished executing.
Thanks
Ronan

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2 Answers

Answer by Jan
on 20 May 2011

A cheap method is to call all functions through a wrapper:
function varargout = wrapper(varargin)
varargout = cell(1, nargout)
[varargout{:}] = feval(varargin);
% Let the logging come here:
fprintf('returned at %s\n', datestr(now, 0));
Then you cannot just catch the return of the function, but the entry also.
Did you inspect the PROFILEr in detail? There are some undocumented features (look on Yair's pages).

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Answer by Andy
on 20 May 2011

If you can get the handle to the command window (I'm sure Yair has done similar things at some point; take a look around www.undocumentedmatlab.com), then you can probably change the FocusGained callback to execute your code. But I don't know if this would overwrite the existing callback for the command window. (I also don't know if there is an existing callback, or what it does).

  1 Comment

If you have an open GUI, the focus does not return to the command window, although all functions are ready.

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