mifirstNot
Syntax
mifirstNot(X, window, [minPeriods])
Please see Moving Functions (m-functions) for the parameters and windowing logic.
Details
Return the index of the first non-Null element of X in a sliding window (based on the number of elements or time).
Examples
$ v = NULL NULL 2 3 4 8 NULL 5 -2 3 -1 0 NULL
$ mifirstNot(v, 3)
[,,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)
col1 |
col2 |
col3 |
col4 |
|---|---|---|---|
1 |
0 |
-1 |
0 |
0 |
1 |
1 |
0 |
0 |
0 |
0 |
0 |
Related function: milastNot