drscl (l) - Linux Manuals

drscl: multiplies an n-element real vector x by the real scalar 1/a

NAME

DRSCL - multiplies 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 component of x. SA must be >= 0, or the subroutine will divide by zero.

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