COLSTDEV

Purpose:

Produces a row of the standard deviations of each column in the input table.

COLSTDEV(a)

A series or table.

A one-row table with the same number of columns as the input table.

colstdev(ravel({1,2,3},{2,3,4}))

returns {{1, 1}}

COLSTDEV computes the sample standard deviation for each column of a series where the sample standard deviation is defined as:

$image\std01.gif$

where the arithmetic mean is defined as:

$image\std02.gif$