First occurance problem in the adjacent coloumn
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I have a matrix A=[1 9
I want to find out the first occurance of j in coloumn 2 after occurance of i in 1st coloumn at index idx.
i tried idx2 = find(A(idx:end, 2) == j, 'first') but it shows me error Second argument must be a positive scalar integer.
Help is much appreciated thanking in advance.