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Is there a way to pause the tic timer (without resetting tic)?

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Dc215905 on 28 Feb 2018
Answered: Dc215905 on 1 Mar 2018
I would like to briefly pause the tic timer. I'm aware of pause() but that doesn't pause the stopwatch. I would like to start and stop (not reset) the stopwatch based on various conditions in my script.

Answers (3)

David Goodmanson
David Goodmanson on 1 Mar 2018
Hi David
Here is a very basic way to accomplish this, no extra structures or anything. It works for a series of tic...[do stuff]...tocc statements. You can save the overall result with x = tocc on the last one.
Since it's pretty simple, there are some limitations. For regular toc, if you do a tic followed by several tocs in a row, each toc gives the time from the initial tic statement. If you follow a tic by more than one tocc, then tocc gets hopelessly confused. So you could not have more than one tocc in a row, which is not the intent anyway.
You can combine this with regular tic and toc, but only sometimes. tocc just looks for the most recent instance of tic, so using toc as in (tic..tocc), (tic..toc) (tic..tocc) works, but a nested one (tic..tocc), (tic..(tic..toc)..tocc) doesn't.
function ac_t = tocc
% accumulated elapsed time between a series of tic and tocc statements.
% to reset, use 'clear tocc' any time before the first relevant tic statement.
% tocc is similar to toc in that
% the tocc command displays a result.
% the x = tocc command saves the result in variable x.
persistent t;
if isempty(t)
t = toc;
t = t + toc;
ac_t = t;
if nargout~=1
disp([' Total elapsed time for selected intervals is ',num2str(t),' seconds'])
end % function

Dc215905 on 1 Mar 2018
Thank you for all of the suggestions! I'm going to test them out in my script and see what comes of it. I'll follow-up.


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