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Finding matrix column index based on certain conditions

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Lucas Carvalho
Lucas Carvalho 2017-7-30
评论： Lucas Carvalho 2017-7-31
Hello guys,
I want to extract the column indexes of a matrix which contains necessarily one element equals to 1 and all the other equal to zero. Matrix example:
A =
1 1 1 0 0 0 0 1 0 0 0 0 0
0 -1 -1 -1 0 0 0 -1 1 0 0 0 0
0 0 0 1 0 -1 0 0 0 1 0 0 0
0 0 1 0 1 0 -1 0 0 0 1 0 0
0 0 0 0 0 1 1 0 0 0 0 1 0
0 1 0 0 -1 0 0 0 0 0 0 0 1
The columns of this matrix which obey these conditions are: 1,9,10,11,12 and 13.
How can I implement these rules into my code??
Thank you very much indeed!

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采纳的回答

James Tursa
James Tursa 2017-7-31
result = find(sum(A==1)==1 & sum(A==0)==(size(A,1)-1));

更多回答（1 个）

Walter Roberson
Walter Roberson 2017-7-31
find( sum(A == 1) == 1 & sum(A == 0) == size(A,1)-1 )

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