mifirstNot

mifirstNot(X, window, [minPeriods])

Please see mFunctions for the parameters and windowing logic.

Return the index of the first non-Null element of X in a sliding window (based on the number of elements or time).

v = NULL NULL 2 3 4 8 NULL 5 -2 3 -1 0 NULL
mifirstNot(v, 3)
// output
[,,2,1,0,0,0,0,1,0,0,0,0]

m = matrix(NULL 1 2 3, 1 NULL 2 3, NULL NULL 3 4, 1 2 3 4)
mifirstNot(m, 2)

Related function: milastNot