dscal.f - Man Page

subroutine dscal (n, da, dx, incx)
DSCAL

DSCAL

Purpose:

    DSCAL scales a vector by a constant.
    uses unrolled loops for increment equal to 1.

Parameters

N

          N is INTEGER
         number of elements in input vector(s)

DA

          DA is DOUBLE PRECISION
           On entry, DA specifies the scalar alpha.

DX

          DX is DOUBLE PRECISION array, dimension ( 1 + ( N - 1 )*abs( INCX ) )

INCX

          INCX is INTEGER
         storage spacing between elements of DX

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Further Details:

     jack dongarra, linpack, 3/11/78.
     modified 3/93 to return if incx .le. 0.
     modified 12/3/93, array(1) declarations changed to array(*)

Definition at line 78 of file dscal.f.