cumcount

cumcount(X)

Please see Cumulative Window Functions for the parameter description and windowing logic.

Cumulatively calculate the number of non-NULL elements in X.

x=[1,2,NULL,3,4,NULL,5,6]
cumcount(x);
// output
[1,2,2,3,4,4,5,6]

m=matrix(1 2 3 NULL 4, 5 6 NULL NULL 8);
m;

cumcount(m);