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Question on a simple "parfor loop"

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harry wang
harry wang 2015-11-23
关闭： MATLAB Answer Bot 2021-8-20
Hi There,
I have a simple parfor loop as belows
c=1;
a=0;
parfor i=-90:90
c=i+91;
a(c)=3;
end
I thought in this way, each iteration is independent and satisfy the rule of parallel computing, but i still get an error message " The variable a in a parfor cannot be classified". Any one could let me know the reason and how to fix the code?
Thanks.

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Walter Roberson
Walter Roberson 2015-11-24
parfor i=-90:90
a(i+91)=3;
end
The parfor index variable must appear directly in the indexing expression, not as a variable computed based upon the indexing expression. This is a limitation on parfor to allow it to do static analysis.

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