drscl.f File Reference

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

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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.

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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:

[in]	N	N is INTEGER The number of components of the vector x.
[in]	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.
[in,out]	SX	SX is DOUBLE PRECISION array, dimension (1+(N-1)*abs(INCX)) The n-element vector x.
[in]	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:

September 2012

Definition at line 85 of file drscl.f.

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