I have a vector x with #'s ( 1 or -1 in them ) in it and I want to "mark" a new vector with the sign of the value of the a streak of H where H = some number ( at the next spot in the vector ) So, say H was equal to 3 and I had a vector of [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] 1 -1 1 1 1 -1 1 1 -1 -1 then, I would want a function to return a new vector of [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] 0 0 0 0 0 1 0 0 0 0 As I said, I used to do these things like this it's been a while and I'm rusty with this stuff. Without looping is preferred but looping is okay also. Mark
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