11.2.5 Covariance

Computes the covariance of the datasets x and y which must be of
same length.

(11.13) 
lag1_autocorrelation_m( 
x, y, mean_x, mean_y) 

Computes the covariance of the datasets x and y using the given
values of the means mean_x and mean_y. The datasets x
and y must be of equal length.

(11.14) 
Release 0.9, documentation updated on October, 2008.