MATLAB: Finding matrix column index based on certain conditions

matrixmatrix indexing

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!

Best Answer

result = find(sum(A==1)==1 & sum(A==0)==(size(A,1)-1));
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