prod
Syntax
prod(X)
Arguments
X is a scalar/vector/matrix.
Details
If X is a vector, return the product of all the elements in X.
If X is a matrix, calculate the product of all the elements in each column of X and return a vector.
As with all aggregate functions, NULL values are not included in the calculation.
Examples
$ prod(1 2 NULL 3);
6
$ m=matrix(1 2 3, 4 5 6);
$ m;
#0 |
#1 |
|---|---|
1 |
4 |
2 |
5 |
3 |
6 |
$ prod(m);
[6,120]