Computational Resources :: SAS/STAT(R) 12.1 User's Guide

Let

$\displaystyle n$	$\displaystyle =$	$\displaystyle \mbox{number of observations}$
$\displaystyle v$	$\displaystyle =$	$\displaystyle \mbox{number of variables}$
$\displaystyle w$	$\displaystyle =$	$\displaystyle \mbox{number of WITH variables}$
$\displaystyle p$	$\displaystyle =$	$\displaystyle \max (v,w)$
$\displaystyle q$	$\displaystyle =$	$\displaystyle \min (v,w)$
$\displaystyle b$	$\displaystyle =$	$\displaystyle v + w$
$\displaystyle t$	$\displaystyle =$	$\displaystyle \mbox{total number of variables (VAR, WITH, and PARTIAL)}$