cumlastNot

cumlastNot(X, [k])

k is a scalar.

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

If X is a vector:

• If k is unspecified, return the last non-NULL element in X;
• If k is specified, return the last 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.

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

cumlastNot(x, 4)
// output
[,1,2,6,6,3,3,3]

m=matrix(1 2 3 NULL 4, NULL NULL 8 8 9);
m;

cumlastNot(m);

Related function: lastNot