How to vectorize a two matrices in row-wise multiplication (optimization)?
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Hi Matlab users,
I have the following code where N = 20000, "prt1" and "P" are both matrices of (20000x20000). As can be seen in the code I want to multiply each row of "prt1" from 1st to 20000th row in row 1 of "P" and then all rows of "prt1" in row 2 of "P" and so on. Every time sum them up and put in the matrix of "S". Unfortunately, This takes me great deal of time. Any way that I can optimize this such vectorization?
Here is the code:
for r = 1:N
for c = 1:N
S(r,c) = sum (prt1(c,:).*P(r,:));
Thank you very much for your hint.
All the best....