& vunit()
 
  Syntax: vunit(<vector>[,<delimiter>]
 
  Returns the unit vector (a vector of magnitude 1), which points in 
  the same direction as the given vector.
 
  Example:
 
  > think vunit(2 0 0)
  1 0 0
  > think vmul(vunit(5 6 7),vmag(5 6 7))
  5 6 7
 
	See Also: vmul(), vdim(), vadd(), vsub(), vmag()