stdp

Syntax

stdp(X)

Arguments

X is a vector/matrix.

Details

If X is a vector, return the population standard deviation of X.

If X is a matrix, calculate the population standard deviation of each column and return a vector.

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

Examples

$ stdp(1 2 3);
0.816497

$ m=matrix(1 3 5 7 9, 1 4 7 10 13);
$ m;

#0	#1
1	1
3	4
5	7
7	10
9	13

$ stdp(m);
[2.8284,4.2426]