axpy(3F)

NAME
     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
     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
     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.
         Y <--- Y + a . X

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


AUTHORS
          Jack Dongarra, linpack, 3/11/78.