_AXPY(3F)							     _AXPY(3F)

NAME    [Toc]    [Back]

     daxpy, saxpy, zaxpy, caxpy	- BLAS level ONE axpy subroutines


FORTRAN	77 SYNOPSIS
     subroutine	daxpy( n, a, x,	incx, y, incy )
     integer	       incx, incy, n
     double precision  a
     double precision  x( 1 ), y( 1 )

     subroutine	saxpy( n, a, x,	incx, y, incy )
     integer	       incx, incy, n
     real	       a
     real	       x( 1 ), y( 1 )

     subroutine	zaxpy( n, a, x,	incx, y, incy )
     integer	       incx, incy, n
     complex*16	       a
     complex*16	       x( 1 ), y( 1 )

     subroutine	caxpy( n, a, x,	incx, y, incy )
     integer	       incx, incy, n
     complex	       a
     complex	       x( 1 ), y( 1 )

C SYNOPSIS    [Toc]    [Back]

     void daxpy( n, a, x, incx,	y, incy	)
     Integer	       incx, incy, n;
     double	       a;
     double	       (*x)[ n ], (*y)[	n ];

     void saxpy( n, a, x, incx,	y, incy	)
     Integer	       incx, incy, n;
     float	       a;
     float	       (*x)[ n ], (*y)[	n ];

     void zaxpy( n, a, x, incx,	y, incy	)
     Integer	       incx, incy, n;
     Zomplex	       a;
     Zomplex	       (*x)[ n ], (*y)[	n ];

     void caxpy( n, a, x, incx,	y, incy	)
     Integer	       incx, incy, n;
     Complex	       a;
     complex	       (*x)[ n ], (*y)[	n ];

DESCRIPTION    [Toc]    [Back]

     daxpy, saxpy, zaxpy, and caxpy compute a constant a times a vector	x plus
     a vector y. The result overwrites the initial values of vector y.




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_AXPY(3F)							     _AXPY(3F)



	 Y <---	Y + a .	X

     incx and incy specify the increment between two consecutive elements of
     respectively vector x and y.

AUTHORS    [Toc]    [Back]

	  Jack Dongarra, linpack, 3/11/78.


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