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drscl.f(3) LAPACK drscl.f(3)

NAME

drscl.f

SYNOPSIS

Functions/Subroutines


subroutine drscl (N, SA, SX, INCX)
DRSCL multiplies a vector by the reciprocal of a real scalar.

Function/Subroutine Documentation

subroutine drscl (integer N, double precision SA, double precision, dimension( * ) SX, integer INCX)

DRSCL multiplies a vector by the reciprocal of a real scalar.

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.

Parameters:

N


N is INTEGER
The number of components of the vector x.

SA


SA is 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


SX is DOUBLE PRECISION array, dimension
(1+(N-1)*abs(INCX))
The n-element vector x.

INCX


INCX is 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

Author:

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Date:

November 2017

Definition at line 86 of file drscl.f.

Author

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Tue Nov 14 2017 Version 3.8.0