Finding the first 1 in indicator variable

Hi all.

If i have an indicator variable which a bunch of 1's. How do i most efficiently find the position of the first 1?

Thx

Answer 1

[Andrei Bobrov]

out = find(A,1,'first')

A - your indicator variable (vector)

[outI,outJ] = find(A,1,'first')

here A - your indicator variable (matrix)

[Mads]

Thank you.