Vector Matrix multiplication (Row wise)

Hi, I need to multiply each row of very large matrix with a row of corresponding vector. I don't really want to use for loop for that, i.e.,
N=15000;
L=rand(N,N); V=rand(N,1);
for i=1:1:N
L(i,:)=V(i)*L(i,:);
end
is it possible to do this in vectorized way?
Thank you
Erdem

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Più risposte (3)

seif seif
seif seif il 26 Gen 2018
Modificato: seif seif il 26 Gen 2018
I'd suggest a faster version than the above methods:
L = L .* v(:, ones(N,1));

2 Commenti

Could you explain that why does this indexing trick work?
Vladimir Kazei's version was significantly faster on my computer.

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Richiesto:

il 16 Set 2015

Commentato:

il 17 Dic 2024

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