Pack three scalar components into a vector. 

   None. 

   VARIABLE  I/O  DESCRIPTION 
   --------  ---  -------------------------------------------------- 
   x, 
   y, 
   z          I   Scalar components of a 3-vector. 
   v          O   Equivalent 3-vector.

   x, 
   y, 
   z           are the scalar components of a 3-vector. 

   v           is the equivalent vector, such that v[0] == x 
                                                   v[1] == y 
                                                   v[2] == z 

   None. 

   Basically, this is just shorthand notation for the common 
   sequence 

         v[0] = x; 
         v[1] = y; 
         v[2] = z; 

   The routine is useful largely for two reasons. First, it 
   reduces the chance that the programmer will make a "cut and 
   paste" mistake, like 

         v[0] = x; 
         v[0] = y; 
         v[0] = z; 

   Second, it makes conversions between equivalent units simpler, 
   and clearer. For instance, the sequence 

         v[0] = x * rpd_c(); 
         v[1] = y * rpd_c();
         v[2] = z * rpd_c();

   can be replaced by the (nearly) equivalent sequence 

         vpack_c ( x, y, z,    v ); 
         vscl_c  ( rpd_c(), v, v ); 

   See: Detailed_Description. 

   None. 

   Error free. 

   None. 

   N.J. Bachman    (JPL)
   I.M. Underwood  (JPL) 

   None. 

   -CSPICE Version 1.0.0, 24-MAY-1999 (IMU) (NJB)

   pack three scalar components into a vector