dget06()

double precision function dget06	(	double precision	RCOND,
		double precision	RCONDC
	)

DGET06

Purpose:

 DGET06 computes a test ratio to compare two values for RCOND.

Parameters

[in]	RCOND	RCOND is DOUBLE PRECISION The estimate of the reciprocal of the condition number of A, as computed by DGECON.
[in]	RCONDC	RCONDC is DOUBLE PRECISION The reciprocal of the condition number of A, computed as ( 1/norm(A) ) / norm(inv(A)).

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Date

December 2016

Definition at line 57 of file dget06.f.

*
*  -- LAPACK test routine (version 3.7.0) --
*  -- LAPACK is a software package provided by Univ. of Tennessee,    --
*  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
*     December 2016
*
*     .. Scalar Arguments ..
      DOUBLE PRECISION   RCOND, RCONDC
*     ..
*
*  =====================================================================
*
*     .. Parameters ..
      DOUBLE PRECISION   ZERO, ONE
      parameter( zero = 0.0d+0, one = 1.0d+0 )
*     ..
*     .. Local Scalars ..
      DOUBLE PRECISION   EPS, RAT
*     ..
*     .. External Functions ..
      DOUBLE PRECISION   DLAMCH
      EXTERNAL           dlamch
*     ..
*     .. Intrinsic Functions ..
      INTRINSIC          max, min
*     ..
*     .. Executable Statements ..
*
      eps = dlamch( 'Epsilon' )
      IF( rcond.GT.zero ) THEN
         IF( rcondc.GT.zero ) THEN
            rat = max( rcond, rcondc ) / min( rcond, rcondc ) -
     $            ( one-eps )
         ELSE
            rat = rcond / eps
         END IF
      ELSE
         IF( rcondc.GT.zero ) THEN
            rat = rcondc / eps
         ELSE
            rat = zero
         END IF
      END IF
      dget06 = rat
      RETURN
*
*     End of DGET06
*

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