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

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.

Thanks,

David

[per isakson]

AFAIK: No

[Walter Roberson]

Cannot be done with tic and toc, which just take real-time clock readings and subtract them.

Answer 1

[Stephen23]

No, tic and toc do not support this. Download and try these, they support "pause":

https://www.mathworks.com/matlabcentral/fileexchange/12422-timetic

https://www.mathworks.com/matlabcentral/fileexchange/12628-stopwatch

Answer 2

[David Goodmanson]

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;
else
  t = t + toc;
end
ac_t = t;

if nargout~=1
  disp([' Total elapsed time for selected intervals is  ',num2str(t),' seconds'])
end

end   % function

Answer 3

[Dc215905]

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.

Cheers,

David