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mxv_c
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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

   void mxv_c ( ConstSpiceDouble    m1  [3][3],
                ConstSpiceDouble    vin [3],
                SpiceDouble         vout[3]    )

Abstract

   Multiply a 3x3 double precision matrix with a 3-dimensional
   double precision vector.

Required_Reading

   None.

Keywords

   MATRIX,  VECTOR


Brief_I/O

   VARIABLE  I/O              DESCRIPTION
   --------  ---  --------------------------------------------------
   m1        I   3x3 double precision matrix.
   vin       I   3-dimensional double precision vector.
   vout      O   3-dimensinoal double precision vector. vout is
                 the product m1*vin.

Detailed_Input

   m1         is an arbitrary 3x3 double precision matrix.

   vin        is an arbitrary 3-dimensional double precision vector.

Detailed_Output

   vout       is a 3-dimensional double precision vector. vout is
              the product m1 * v. vout may overwrite vin.

Parameters

   None.

Exceptions

   Error free.

Files

   None.

Particulars

   The intermediate results of the operation performed by this routine
   are buffered in a temporary vector which is later moved to the output
   vector.  Thus vout can be actually be vin if desired without
   interfering with the computation.

Examples

   Let

      m1 = |  0.  1.  0. |   and  vin = | 1. |
           |             |              |    |
           | -1.  0.  0. |              | 2. |
           |             |              |    |
           |  0.  0.  1. |              | 3. |

   Then the call

      mxv_c ( m1, vin, vout );

   produces the vector

      vout = |  2. |
             |     |
             | -1. |
             |     |
             |  3. |

Restrictions

   The user is responsible for checking the magnitudes of the
   elements of matrix and vin so that a floating point overflow does
   not occur.

Literature_References

   None.

Author_and_Institution

   Ed Wright       (JPL)
   W.M. Owen       (JPL)

Version

   -CSPICE Version 1.0.0, 16-APR-1999 (EDW)

Index_Entries

   matrix times 3-dimensional vector
Wed Apr  5 17:54:39 2017