cumfirstNot
Syntax
cumfirstNot(X, [k])
Arguments
k is a scalar.
Please see Cumulative Window Functions for the parameter description and windowing logic.
Details
If X is a vector:
- If k is unspecified, return the first non-NULL element in X;
- If k is specified, return the first element that is not k.
If X is a matrix, conduct the aforementioned calculation within each column of X. The result is a matrix with the same shape as X.
Examples
x=[NULL,1,2,6,NULL,3,4,NULL]
cumfirstNot(x);
// output
[,1,1,1,1,1,1,1]
cumfirstNot(x, 1)
// output
[,,2,2,2,2,2,2]
m=matrix(1 2 3 NULL 4, NULL NULL 8 8 9);
m;
#0 | #1 |
---|---|
1 | |
2 | |
3 | 8 |
8 | |
4 | 9 |
cumfirstNot(m);
#0 | #1 |
---|---|
1 | |
1 | |
1 | 8 |
1 | 8 |
1 | 8 |
Related function: firstNot