Sliced scalar assignment in parfor

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Matt J
Matt J 2013-12-10
评论： Edric Ellis 2024-1-4
The following code
A=rand(10);
parfor j=1:10
A(:,j)=1;
end
gives me the following error
Error using test (line 5)
Subscripted assignment dimension mismatch.
Caused by:
Subscripted assignment dimension mismatch.
It seems that you cannot do scalar assignment with parfor sliced variables? If not, is this documented somewhere? I know sliced variables must maintain a constant shape, but scalar assignment does not violate this.

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Edric Ellis
Edric Ellis 2013-12-11
编辑：Edric Ellis 2024-1-4
Unfortunately, this is a limitation of PARFOR. The only workaround for MATLAB releases prior to R2019b is not to use scalar expansion like that. The limitation was removed in R2019b.
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Edric Ellis
Edric Ellis 2013-12-11
Yes, only sliced variables have the limitation.
Edric Ellis
Edric Ellis 2024-1-4
Just updated this ancient answer because I just realised the limitation was removed ages ago...

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