parfor for double iteration??
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Dear, I want to make a matrix G(m, n) as follows:
gamma = sqrt(sqrt(k/(E*I))); % gamma
G = zeros(length(x),length(qusi));
parfor n1 = 1:length(x)
for n2 = 1:length(qusi)
qua = gamma*abs(qusi(n2)-x(n1))/sqrt(2);
G(n1,n2) = (gamma/(2*k))*exp(-qua)*sin(qua + pi/4); % G(x,qusi)
end
end
However, the error come up as follows:
Error using testsquare_test (line 53)
Error: The variable G in a parfor cannot be classified.
See Parallel for Loops in MATLAB, "Overview".
I can't understand it. How should I do?
Could you please help me?
1 Kommentar
Khoo
am 23 Aug. 2013
Are you using the parallel computing from matlabpool? parfor is same as for-loop but it's in parallel computing.
Akzeptierte Antwort
Edric Ellis
am 27 Aug. 2013
Unfortunately, PARFOR doesn't understand how you're accessing 'G' even though you are using it in an order-independent way. What you need to do is build up a temporary row, and then assign it to the row of 'G' all in one go:
parfor n1 = 1:length(x)
tempRow = zeros(1, length(qusi));
for n2 = 1:length(qusi)
qua = gamma*abs(qusi(n2)-x(n1))/sqrt(2);
tempRow(n2) = (gamma/(2*k))*exp(-qua)*sin(qua + pi/4);
end
G(n1, :) = tempRow;
end
Weitere Antworten (1)
Madhura Suresh
am 26 Aug. 2013
You will need to slice/classify your variables in parfor loops. Look at this blog:
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