firstNot

swordfish.function.firstNot()

If X is a vector:

• If k is not specified: return the first element of X that is not null.

• If k is specified: return the first element of X that is neither k nor null.

If X is a matrix or table, conduct the aforementioned calculation within each column of X. The result is a vector.

Parameters:

• X (Constant) – A scalar, pair, vector, matrix or table.

• k (Constant, optional) – A scalar.