How to break out of a while loop inside a function block ?

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Prashanth Krishnan
Prashanth Krishnan 2015-7-28
评论： Camile van der Heijden 2018-3-1
I'm trying to break out of a while loop when a key is pressed and I've achieved this through the following code snippet -
keep = 1;
h = figure('KeyPressFcn','keep=0');
while keep
pause(0.01)
end
close(h)
I need to incorporate this into a GUI. But when this exact same code snippet is inserted into a function block, I'm no longer able to break out of the loop. Here's a code for the same -
function calibrate()
keep = 1;
h = figure('KeyPressFcn','keep=0');
while keep
pause(0.01)
end
close(h)
How do I get this to work ?
Thanks !

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采纳的回答

Jon
Jon 2015-7-28
编辑：Jon 2015-7-28
The search function is your friend. See https://ch.mathworks.com/matlabcentral/newsreader/view_thread/315080 for someone with the same problem, and an explanation and solution.
  2 个评论
Camile van der Heijden
Camile van der Heijden 2018-3-1
Unfortunately, the newsreader link Jon referred to is no longer available. I would love to know what it said though. Does it involve using flag variables?

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更多回答（1 个）

Muthu Annamalai
Muthu Annamalai 2015-7-28
编辑：Muthu Annamalai 2015-7-28
Changing your code to,
keep = true;
h = figure('KeyPressFcn',@() keep= ~keep );
while keep
pause(0.01)
sprintf('keep = %d',keep);
end
close(h)
may work. If this doesn't work, make keep an instance of a handle class.

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