how to take the non zero values from one matrix and put them in another??

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Dimitris
Dimitris 2011-7-25
I have a matrix [640 640] with few non zero values and many zeros. I want to put all the non zero values in a new matrix. Something like:
for i=1:640
for j=1:640
if A(i,j)~=0
B(i,j)=A(i,j)
end
end
end
But this doesn't work.. Any suggestions?
  1 个评论
Fangjun Jiang
Fangjun Jiang 2011-7-25
What do you mean doesn't work. There is an easy way to do it which uses logic index. What value do you want for other elements in B?

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采纳的回答

Fangjun Jiang
Fangjun Jiang 2011-7-25
B=A(A~=0);

更多回答（1 个）

Florin Neacsu
Florin Neacsu 2011-7-25
Try :
ind1=A~=0;
B(ind1)=A(ind1);
Regards, Florin

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