MATLAB Answers

How to efficiently do matrix multiplication for 2 specific dimensions of the tensor?

16 ビュー (過去 30 日間)
SC
SC 2019 年 11 月 20 日
回答済み: James Tursa 2019 年 11 月 20 日
Hi,
I have a rank-5 tensor A and a rank-2 matrix B, and I want to captured the first two dimentions of A as slices and do the mutiplication with B to form an output C.
I can do it as below by using 3 for loops. But that is not efficient. How can I do it vectorizedly (i.e. without using the for loops)?
Many thanks!
My current code
A=randn(3,4,8,2,14);
B=randn(7,3);
C=zeros(7,4,8,2,14); % (7, 4) is due to matrix mutiplication of (7, 3)x(3, 4)
for i=1:8
for j=1:2
for k=1:14
A_slice=A(:,:,i,j,k);
C_slice=B*A_slice;
C(:,:,i,j,k)=C_slice;
end
end
end
C % the output I want

  0 件のコメント

サインインしてコメントする。

その他の回答 (0 件)

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by