TABLE OF CONTENTS
::pwtk::norm
SYNOPSIS
proc ::pwtk::norm {v} {
PURPOSE
Return the size (norm) of an N-dimensional vector.
EXAMPLE
::pwtk::norm {1.0 2.0 0.0}
SOURCE
set sum 0.0 foreach c $v { set sum [expr $sum + $c*$c] } return [expr sqrt($sum)] }