what does this error with tic\toc means?

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i have this problem - matlab tells me I have an error while running-
Error using toc
You must call TIC without an output argument before calling TOC without an
input argument.
Error in hand_rotation2/youPress (line 126)
c = toc;
Error while evaluating figure KeyPressFcn
what does it mean, and how can I fix it?

Accepted Answer

Wayne King
Wayne King on 15 Oct 2012
Edited: Wayne King on 15 Oct 2012
It means to use toc, you have to call tic first somewhere
for ii = 1:10
x(ii) = ii+1;
y = toc;
If you use toc by itself, it must have been preceded by a tic command sometime during the current session, then it gives the time since the most recent tic command. In this latter case, that is probably not what you want.
Image Analyst
Image Analyst on 15 Oct 2012
Maybe the tic doesn't survive once you've exited the function.

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More Answers (1)

Nicolas Rodriguez
Nicolas Rodriguez on 8 Jan 2016
I have the same problem. My code runs as long as I keep matlab open. Once I close it, it won't let me run it and show me error

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