drscl (3)

Functions/Subroutines

subroutine drscl (N, SA, SX, INCX)

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

subroutine drscl (integerN, double precisionSA, double precision, dimension( * )SX, integerINCX)

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:

September 2012

Definition at line 85 of file drscl.f.

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