Find out indexes of zeroed elements in matrix

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lucksBi
lucksBi el 12 de Jun. de 2017
Editada: David Goodmanson el 12 de Jun. de 2017
hey
how can i find out indexes of zeroed elements of all rows in a matrix.e.g.
matrix= [1,0,0,2,0,0;1,2,6,5,0,3;1,0,2,9,4,0]
it'll show 2;3;5;6 for row 1, 5 for row2 and 2;6 for row3.
Thanks

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David Goodmanson
David Goodmanson el 12 de Jun. de 2017
Editada: David Goodmanson el 12 de Jun. de 2017
Hi lucksBi, the find command gives you the row and column indices for a given condition. The find command searches column by column but you are more interested in row by row, so in this case it's better to use the transpose of the matrix
[a b] = find(matrix.'==0];
inds = [b a]
inds =
1 2
1 3
1 5
1 6
2 5
3 2
3 6

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