Matlab for loop

[mechMH]

Hi everyone,
i'm working on a code which has two 5*3 matrices,I want to add each column in say matrix "A" to every column in matrix "B"
so the resultant matrix is 5*9.
I'm doing it with FOR loop but it only returns the final column values. I hope if there are any suggestions!

 

[GregLocock]

There are neater ways of doing this, but using loops is robust

Out_matrix=zeros(5,9);
for jj=0:2
for kk=1:3
Out_matrix,(jj*3)+kk)=A,jj+1)+B,kk);
end
end


Cheers

Greg Locock


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[SomptingGuy]

If you are doing loops, bear in mind two things:

1) Pre-allocate your array (Greg's first line). Never grow it.
2) Realise that the neat and satisfying one-liners (vectorized solutions) don't have as much advantage over loops these days.


Steve

 

[IRstuff]

I'm doing it with FOR loop but it only returns the final column values.

This isn't making sense; there are no intermediate values.

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert!

https://www.youtube.com/watch?v=BKorP55Aqvg

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[GregLocock]

Incidentally i wrote that on the fly, I think there is a +1 missing in there somewhere.

Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376

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