New answers tagged sparse-arrays
1
vote
2
votes
Nonzero element positions of a matrix
Using SequencePosition:
First /@ SequencePosition[#, {Except[0]}] & /@ m
{{1, 2}, {1, 3}}
- 38.2k
2
votes
Nonzero element positions of a matrix
m = {{1, 2, 0}, {4, 0, 9}};
Flatten @* Values @* KeyDrop[0] @* PositionIndex /@ m
{1, 2}, {1, 3}}
- 41k
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