Finding the nonzero element in a specific row

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Mohammad Mahmoud
Mohammad Mahmoud 2019-7-18
评论： infinity 2019-7-18
If i have a matrix and i want to find the indices of a non zero elements in a specific row only how can i do that ?

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回答（2 个）

infinity
infinity 2019-7-18
编辑：infinity 2019-7-18
Hello,
Yes, there is. You can refer this simple example
A = [1 2; 0 3]
[rows,cols,vals] = find(A==0)
  2 个评论
Mohammad Mahmoud
Mohammad Mahmoud 2019-7-18
Thank you is there a simple way to make it such that
i determine which row to find
for example in your example
i want to type the row number and it gives me the index(2,2) for the non zero element
hope this clears things up
infinity
infinity 2019-7-18
Hello,
You could see the answer below of @Star

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Star Strider
Star Strider 2019-7-18
Select the row, then use find:
A = [1 3 0; 2 0 4; 0 7 9]
DesiredRow = 2
cix = find(A(DesiredRow,:) ~= 0)
so:
A =
1 3 0
2 0 4
0 7 9
DesiredRow =
2
cix =
1 3

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