[ новости /+++ | форум | теги | ]

NAME
     dger - perform the rank 1 operation   A := alpha*x*y' + A

SYNOPSIS
     SUBROUTINE DGER ( M, N, ALPHA, X, INCX, Y, INCY, A, LDA )

     DOUBLE PRECISION ALPHA

     INTEGER INCX, INCY, LDA, M, N

     DOUBLE PRECISION A( LDA, * ), X( * ), Y( * )



     #include <sunperf.h>

     void dger(int m, int n, double alpha, double *dx, int  incx,
               double *dy, int incy, double *da, int lda) ;

PURPOSE
     DGER   performs the rank 1 operation A  :=  alpha*x*y'  +  A
     where alpha is a scalar, x is an m element vector, y is an n
     element vector and A is an m by n matrix.


PARAMETERS
     M         - INTEGER.
               On entry, M specifies the number of  rows  of  the
               matrix  A.  M must be at least zero.  Unchanged on
               exit.

     N         - INTEGER.
               On entry, N specifies the number of columns of the
               matrix  A.  N must be at least zero.  Unchanged on
               exit.

     ALPHA     - DOUBLE PRECISION.
               On  entry,  ALPHA  specifies  the  scalar   alpha.
               Unchanged on exit.

     X         - DOUBLE PRECISION array of dimension at least
               ( 1 + ( m - 1 )*abs( INCX ) ).  Before entry,  the
               incremented  array  X  must  contain the m element
               vector x.  Unchanged on exit.

     INCX      - INTEGER.
               On entry, INCX specifies  the  increment  for  the
               elements  of  X. INCX must not be zero.  Unchanged
               on exit.

     Y         - DOUBLE PRECISION array of dimension at least
               ( 1 + ( n - 1 )*abs( INCY ) ).  Before entry,  the
               incremented  array  Y  must  contain the n element
               vector y.  Unchanged on exit.

     INCY      - INTEGER.
               On entry, INCY specifies  the  increment  for  the
               elements  of  Y. INCY must not be zero.  Unchanged
               on exit.

     A         - DOUBLE PRECISION array of DIMENSION ( LDA, n ).
               Before entry, the leading m by n part of the array
               A  must  contain  the  matrix  of coefficients. On
               exit, A is overwritten by the updated matrix.

     LDA       - INTEGER.
               On entry, LDA specifies the first dimension  of  A
               as declared in the calling (sub) program. LDA must
               be at least max( 1, m ).  Unchanged on exit.

Партнёры:

Хостинг: