parfor for double iteration??
7 visualizzazioni (ultimi 30 giorni)
Mostra commenti meno recenti
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 Commento
Khoo
il 23 Ago 2013
Are you using the parallel computing from matlabpool? parfor is same as for-loop but it's in parallel computing.
Risposta accettata
Edric Ellis
il 27 Ago 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
Più risposte (1)
Madhura Suresh
il 26 Ago 2013
You will need to slice/classify your variables in parfor loops. Look at this blog:
Vedere anche
Categorie
Scopri di più su Parallel for-Loops (parfor) in Help Center e File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!