remove rows zeros( condition remove)
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i have a=
1 2 3 4 5
0 0 0 8 9
4 5 8 5 6
0 0 0 8 6
i need a=
1 2 3 4 5
4 5 8 5 6
i have to delete 2. and 4. rows who have zeros (not all rows zeros)in first three column(condition remove)
回答（2 个）
Jan
2018-6-27
A = [1 2 3 4 5; ...
0 0 0 8 9; ...
4 5 8 5 6; ...
0 0 0 8 6] ;
index = any(A(:, 1:3), 2);
B = A(index, :)
A = [1 2 3 4 5
0 0 0 8 9
4 5 8 5 6
0 0 0 8 6] ;
idx = A==0 ;
A(sum(idx(:,1:3),2)==3,:) = [];
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2018-6-27
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