& vmag()
 
  Syntax: vmag(<vector>[,<delimiter>]
 
  Returns the magnitude of a vector, using a euclidean distance 
  metric. That is, for vector a b c d, returns sqrt(a^2+b^2+c^2+d^2).
 
  Example:
 
  >think vmag(3 4) 
  5
 	
  See Also: vmul(), vdim(), vadd(), vsub(), vunit()