variance ( table )

Purpose: Returns a table with each column of each array holding the variance of each column: (var = 1/(n-1) ((x1-mean)^2 + (x2-mean)^2 + ... + (xn-mean)^2)), the xi's are the data values in each column, mean is the mean of the data values, and n is the number of data values in each column. The new table has labels to indicate columns now contain the variance.

Used by: Plugin

Uses: Table, AnalysisPlugins, stats, Numeric

Input: table : Table

Output: variance : Table

Preconditions: None

Postconditions: None

SRS Refs: 3.2.1.3c

Author: mayadm

Date: 30/7/02