sum

Syntax

sum(X)

Arguments

X is a scalar/vector/matrix.

Details

If X is a vector, return the sum of all the elements in X.

If X is a matrix, calculate the sum of each column of X and return a vector.

As with all aggregate functions, NULL values are not included in the calculation.

If all elements of a calculation are NULLs, the result is NULL.

Examples

$ sum(1 2 3 NULL 4);
10

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

$ sum(m);
[6,15]