Parallel pool: Conversion to double from cell is not possible

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Light.16
Light.16 2017-2-6
回答： Edric Ellis 2017-2-7
Hello guys!
i'm trying to solve this problem. I started this loop (where B is a table).
parfor i=1:116676;
if G(i)== 1;
S(i,:)= table2cell(B(i,:));
end
end
My problem is that is i run the loop without "parfor" it works... but if i use "parfor" the cicle doesn't works and Matlab told me:
Conversion to double from cell is not possible.
What can i do for solve this problem?
thank you :D

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回答（1 个）

Edric Ellis
Edric Ellis 2017-2-7
The problem here is that you haven't pre-allocated S, and unfortunately this doesn't quite work out correctly in parfor. The simple fix is to pre-allocate S to be a cell array of the correct size.
B = table(rand(10,1), rand(10,1));
G = rand(height(B),1) > 0.5;
S = cell(height(B), width(B));
parfor i=1:height(B)
if G(i)== 1
S(i,:)= table2cell(B(i,:));
end
end

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