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

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Ronan 2011-5-20

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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

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Fangjun Jiang 2011-5-20

What is the use case?

Ronan 2011-5-20

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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Answer 1

Jan 2011-5-20

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在 MATLAB Online 中打开

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 2

Andy 2011-5-20

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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).