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NAME
     drotmg - Construct  a  Gentleman's  modified  Given's  plane
     rotation

SYNOPSIS
     SUBROUTINE DROTG (D1, D2, B1, B2, PARAM)

     DOUBLE PRECISION    B1, B2, D1, D2, PARAM(5)



     #include <sunperf.h>

     void drotmg(double *dd1, double *dd2,  double  *db1,  double
               *db2, double *dparam) ;

PURPOSE
     SROTMG - Construct  Gentleman's  modified  a  Given's  plane
     rotation that will annihilate an element of a vector.


PARAMETERS
     D1        - DOUBLE PRECISION.
               On entry,  the  first  diagonal  entry  in  the  H
               matrix.  On exit, changed to reflect the effect of
               the transformation.

     D2        - DOUBLE PRECISION.
               On entry, the  second  diagonal  entry  in  the  H
               matrix.  On exit, changed to reflect the effect of
               the transformation.

     B1        - DOUBLE PRECISION.
               On entry, the first element of the vector to which
               the  H  matrix  is  applied.   On exit, changed to
               reflect the effect of the transformation.

     B2        - DOUBLE PRECISION.
               On entry, the second  element  of  the  vector  to
               which  the  H matrix is applied.  On exit, changed
               to reflect the effect of the transformation.

     PARAM     - DOUBLE PRECISION.
               On entry, PARAM(1) describes the  form  of  the  H
               matrix.    On  exit,  PARAM(2..5)  contain  the  H
               matrix.

Партнёры:

Хостинг: