Index of Functions: A B C D E F G H I J K L M N O P Q R S T U V W X
Index Page vaddg_c
Table of contents
Procedure Abstract Required_Reading Keywords Brief_I/O Detailed_Input | Detailed_Output Parameters Exceptions Files Particulars Examples | Restrictions Literature_References Author_and_Institution Version Index_Entries
#### Procedure
       vaddg_c ( Vector addition, general dimension )

       void vaddg_c ( ConstSpiceDouble  * v1,
                      ConstSpiceDouble  * v2,
                      SpiceInt            ndim,
                      SpiceDouble       * vout )
#### Abstract
       Add two vectors of arbitrary dimension.
#### Required_Reading
       None.
#### Keywords
       VECTOR
#### Brief_I/O
       VARIABLE  I/O  DESCRIPTION
       --------  ---  --------------------------------------------------
       v1         I   First vector to be added.
       v2         I   Second vector to be added.
       ndim       I   Dimension of `v1', `v2', and `vout'.
       vout       O   Sum vector, v1 + v2.
#### Detailed_Input
       v1,
       v2          are two arbitrary double precision n-dimensional
                   vectors.

       ndim        is the dimension of `v1', `v2' and `vout'.
#### Detailed_Output
       vout        is the double precision n-dimensional vector sum of `v1'
                   and `v2'. `vout' may overwrite either `v1' or `v2'.
#### Parameters
       None.
#### Exceptions
       Error free.
#### Files
       None.
#### Particulars
       This routine simply performs addition between components of `v1'
       and `v2'. No checking is performed to determine whether floating
       point overflow has occurred.
#### Examples
       The numerical results shown for this example may differ across
       platforms. The results depend on the SPICE kernels used as
       input, the compiler and supporting libraries, and the machine
       specific arithmetic implementation.

       1) Define two sets of n-dimensional vectors and compute the sum
          of each vector in first set with the corresponding vector in
          the second set.

          Example code begins here.

          /.
             Program vaddg_ex1
          ./
          #include <stdio.h>
          #include "SpiceUsr.h"

          int main( )
          {

             /.
             Local parameters.
             ./
             #define NDIM         4
             #define SETSIZ       2

             /.
             Local variables.
             ./
             SpiceDouble          vout   [NDIM];

             SpiceInt             i;

             /.
             Define the two vector sets.
             ./
             SpiceDouble          seta   [SETSIZ][NDIM] = {
                                       {1.0,   2.0,   3.0,    4.0},
                                       {1.e-7, 1.e23, 1.e-9,  0.0} };

             SpiceDouble          setb   [SETSIZ][NDIM] = {
                                       {4.0,   5.0,    6.0,  7.0},
                                       {1.e24, 1.e23,  0.0,  3.e-23} };

             /.
             Calculate the sum of each pair of vectors
             ./
             for ( i = 0; i < SETSIZ; i++ )
             {

                vaddg_c ( seta[i], setb[i], NDIM, vout );

                printf( "Vector A  :  %10.2e %10.2e %10.2e %10.2e\n",
                        seta[i][0], seta[i][1], seta[i][2], seta[i][3] );
                printf( "Vector B  :  %10.2e %10.2e %10.2e %10.2e\n",
                        setb[i][0], setb[i][1], setb[i][2], setb[i][3] );
                printf( "Sum vector:  %10.2e %10.2e %10.2e %10.2e\n",
                               vout[0], vout[1], vout[2], vout[3] );
                printf( "\n" );

             }

             return ( 0 );
          }

          When this program was executed on a Mac/Intel/cc/64-bit
          platform, the output was:

          Vector A  :    1.00e+00   2.00e+00   3.00e+00   4.00e+00
          Vector B  :    4.00e+00   5.00e+00   6.00e+00   7.00e+00
          Sum vector:    5.00e+00   7.00e+00   9.00e+00   1.10e+01

          Vector A  :    1.00e-07   1.00e+23   1.00e-09   0.00e+00
          Vector B  :    1.00e+24   1.00e+23   0.00e+00   3.00e-23
          Sum vector:    1.00e+24   2.00e+23   1.00e-09   3.00e-23
#### Restrictions
       1)  The user is required to determine that the magnitude each
           component of the vectors is within the appropriate range so as
           not to cause floating point overflow.
#### Literature_References
       None.
#### Author_and_Institution
       J. Diaz del Rio     (ODC Space)
       W.M. Owen           (JPL)
       E.D. Wright         (JPL)
#### Version
       -CSPICE Version 1.0.2, 05-JUL-2021 (JDR)

           Edited the header to comply with NAIF standard. Added complete
           code example based on existing example.

       -CSPICE Version 1.0.1, 07-NOV-2003 (EDW)

           Corrected a mistake in the second example's value
           for VOUT, i.e. replaced [1D24, 2D23, 0.0] with
           [1e24, 2e23].

       -CSPICE Version 1.0.0, 29-JUN-1999 (EDW) (WMO)
#### Index_Entries
       n-dimensional vector addition
#### Link to routine vaddg_c source file vaddg_c.c

    Fri Dec 31 18:41:14 2021