drscl(3)

NAME

DRSCL - multiplie an n-element real vector x by the real

scalar 1/a

SYNOPSIS

SUBROUTINE DRSCL( N, SA, SX, INCX )
    INTEGER       INCX, N
    DOUBLE        PRECISION SA
    DOUBLE        PRECISION SX( * )

PURPOSE

DRSCL multiplies an n-element real vector x by the real

scalar 1/a. This is done without overflow or underflow as long as
the final result x/a does not overflow or underflow.

ARGUMENTS

N (input) INTEGER

The number of components of the vector x.

SA (input) DOUBLE PRECISION

The scalar a which is used to divide each compo

nent of x. SA must be >= 0, or the subroutine will divide by ze

ro.

SX (input/output) DOUBLE PRECISION array, dimension

(1+(N-1)*abs(INCX)) The n-element vector x.

INCX (input) INTEGER

The increment between successive values of the

vector SX. > 0: SX(1) = X(1) and SX(1+(i-1)*INCX) = x(i),

1< i<= n

LAPACK version 3.0 15 June 2000

DRSCL(3)