VECANGLE: An alternative to atan, returning an arctangent in the 
             range 0 to 2*pi.
 
 Calling Sequence:
 
   ang = vecmag2(num,dum)
 
 INPUT:
 
   num		: Numerator, vector of size (1,nv).
   dem		: Denominator, vector of size (1,nv).

 OUTPUT:
   ang		: Arctangents, row vector of angles.
 
 Description:
 
   The components of the vector ang are the arctangent of the corresponding
   enties of num./dem. This function is an alternative for 
   atan, returning an angle in the range 0 to 2*pi.
 
 Examples:
 
   Find the atan(1.2,2.0) and atan(1.5,3.4) using vecangle
 
   ang = vecangle([1.2 1.5], [2.0 3.4]);

    Copyright (C) 2000 Mark Spink

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

Package: nurbs