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Problem with parallel loops

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Kian
Kian il 22 Ott 2013
Chiuso: MATLAB Answer Bot il 20 Ago 2021
Matlab does not let me to perform the following parfor loop as it warns me that valid indices for A is restricted. How can I overcome this? Any suggestions would be appreciated.
A = zeros(4,4);
a = [1 1 1 2 2 3];
b = [2 3 4 3 4 4];
parfor i = 1:6
A(a(i),b(i)) = corr(C(a(i),:),D(b(i),:));
end
C and D can be any matrices.

Risposte (2)

Matt J
Matt J il 22 Ott 2013
Modificato: Matt J il 22 Ott 2013
If a and b are small
s=zeros(1,6);
Ca=C(a,:).';
Db=D(b,:).';
parfor i = 1:6
s(i) = corr(Ca(:,i).',Db(:,i).');
end
A=sparse(a,b,s,4,4);
If C and D are small,
s=zeros(1,6);
C=C.';
D=D.';
parfor i = 1:6
s(i) = corr(C(:,a(i).'), D(:,b(i)).');
end
A=sparse(a,b,s,4,4);

Kian
Kian il 23 Ott 2013
Thank you Matt, I really appreciate your help.

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