NAME

BLAS/SRC/dscal.f

SYNOPSIS

Functions/Subroutines

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

Function/Subroutine Documentation

subroutine dscal (integer n, double precision da, double precision, dimension(*) dx, integer incx)

DSCAL

Purpose:



    DSCAL scales a vector by a constant.


    uses unrolled loops for increment equal to 1.

Parameters



          N is INTEGER


         number of elements in input vector(s)



          DA is DOUBLE PRECISION


           On entry, DA specifies the scalar alpha.



          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.

Author

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