One possible way is to create the figure before starting your loop, keep its handle and check that it's not been deleted (which will happen when you close the figure):
w = webcam;
hfig = figure;
while isvalid(hfig) %while figure has not been closed
You do not have to restart Matlab to run a Matlab program. It is much faster to do this in a loop inside Matlab.
diary('D:\Temp\Result.txt');
for i = 1:10000
callYourFunction()
end
diary('off');
Of course you can use other methods thandiary to create the log file, e.g.:
Str = evalc('callYourFunction')
and append the string Str to a text file. There are more possibilities, but currently the problem description is not clear enough to decide for a solution.
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