LAPACK  3.5.0
LAPACK: Linear Algebra PACKage
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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.

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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