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Find rows containing N zeros in a matrix

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Giorgos Papakonstantinou
评论： Giorgos Papakonstantinou 2014-1-17
I have a matrix like:
mat =[1 2 3;
0 0 3;
1 2 0;
0 0 0;
2 0 0];
To find a row full of zeros I do:
mat(all(mat==0,2)
ans =
0 0 0
What can I do to find the rows which only two zeros?
To get this:
ans =
0 0 3
2 0 0

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采纳的回答

Azzi Abdelmalek
Azzi Abdelmalek 2014-1-16
编辑：Azzi Abdelmalek 2014-1-17
mat(sum(mat==0,2)==2,:)
For general case
N=2
out=mat(sum(mat==0,2)==N,:)

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