Getting user input until they select the right choice

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Duncan
Duncan 2014-9-6
编辑： per isakson 2014-9-6
I have a code which requires the user to select a point on a plot. If they select a point that is not on the plot then it will keep asking the user to click on another point. Is the a way to do this? or something similar that I could work with?
Thanks

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回答（1 个）

per isakson
per isakson 2014-9-6
编辑：per isakson 2014-9-6
Start simple. Hint:
x = inf;
y = inf;
while is_outside(x,y)
disp('select a point')
[x,y] = ginput(1);
end
where is_outside is a function with a couple of if-statements.
Cntrl+C works.

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