Determine the order of elements in a double precision array. 

   None. 

   VARIABLE  I/O  DESCRIPTION 
   --------  ---  -------------------------------------------------- 
   array      I   Input array. 
   ndim       I   Dimension of array. 
   iorder     O   Order vector for array. 

   array       is the input array. 

   ndim        is the number of elements in the input array. 

   iorder      is the order vector for the input array. 
               iorder[0] is the index of the smallest element 
               of array; iorder[1] is the index of the next 
               smallest; and so on. 

               The elements of iorder range from zero to ndim-1.

   None. 

   orderd_c finds the index of the smallest element of the input 
   array. This becomes the first element of the order vector. 
   The process is repeated for the rest of the elements. 

   The order vector returned by orderd_c may be used by any of 
   the reord* routines to sort sets of related arrays, as shown 
   in the example below. 

   In the following example, the order* and reord* routines are 
   used to sort four related arrays (containing the names, 
   masses, integer ID codes, and visual magnitudes for a group 
   of satellites). This is representative of the typical use of 
   these routines. 

      #include "SpiceUsr.h"
           .
           .
           .
      /.
      Sort the object arrays by name. 
      ./ 

      orderc_c ( namlen, names, n,  iorder ); 

      reordc_c ( iorder, n, namlen, names  );
      reordd_c ( iorder, n,         masses ); 
      reordi_c ( iorder, n,         codes  ); 
      reordd_c ( iorder, n,         vmags  );

   None. 

   Error free. 

   None. 

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

   None. 

   -CSPICE Version 1.0.0, 08-JUL-2002 (NJB) (IMU)

   order of a d.p. array