How can I use the Xcorr function for two matrix operation! I want to use this for gpuArray.

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ang lee
ang lee 2019-11-25
编辑： Ridwan Alam 2019-12-3
my code as follows
s1; %this is a matrix for 512*403;
s2; %this is a matrix for 512*403;
for i = 1:512
[acor lag] = xcorr(s1(i,:),s2(i,:));
end
I want to use the gpuArray for this, and I don't want to use the for loop, how can I do this.

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回答（1 个）

Ridwan Alam
Ridwan Alam 2019-11-25
编辑：Ridwan Alam 2019-11-25
The operation (xcorr) inside the for loop is not a matrix operation, rather an operation between two vectors (corresponding rows of two matrices). I don't think you can skip the for loop unfortunately.
Other than that,
S1 = gpuArray(s1);
S2 = gpuArray(s2);
acor = [];
for i = 1:512
[acori,lag(i)] = xcorr(S1(i,:),S2(i,:));
acor(i,:) = gather(acori);
end
  2 个评论
ang lee
ang lee 2019-11-25
Do you think I can rewrite the xcorr function so that it can perform matrix operations, because I think parallel operations without the for loop will be faster.
Ridwan Alam
Ridwan Alam 2019-11-25
编辑：Ridwan Alam 2019-12-3
that's indeed a good idea. specially if you transpose the second matrix, it should have a syntax similar to matrix multiplication. good luck, and please keep us informed. also, if it works, please accept the response as an answer. thanks.

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