Simple Question about Optimization of a FOR loop
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How can I optimize (vectorize?) the following code in order to avoid the for loop and make the code to run faster?
for i=1:55;
A(i)=B((i-1)*3+1,1);
end
A is 1 x 55 and B is 165 x 1
Many thanks!
3 个评论
Matt Kindig
2013-6-14
This loop will make A only 1x55, not 55x55.
Laila Kazemi
2013-6-14
bc ur only assigning one raw to A
Mohsen
2013-6-14
回答（2 个）
Laila Kazemi
2013-6-14
0 个投票
C= B*3 +1 A (1:55, 1:55)= C(1:55, 1)
but the dimensions of ur matrices dont match , if B was 55 by 1 , it would have worked
3 个评论
Laila Kazemi
2013-6-14
C= B*3 +1
A (1:55, 1:55)= C(1:55, 1)
Laila Kazemi
2013-6-14
actaully instead one make a matrix called D with D( , 1:165)=(1)
Mohsen
2013-6-16
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