sget06()

real function sget06	(	real	RCOND,
		real	RCONDC
	)

SGET06

Purpose:

 SGET06 computes a test ratio to compare two values for RCOND.

Parameters

[in]	RCOND	RCOND is REAL The estimate of the reciprocal of the condition number of A, as computed by SGECON.
[in]	RCONDC	RCONDC is REAL 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 sget06.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 ..
      REAL               RCOND, RCONDC
*     ..
*
*  =====================================================================
*
*     .. Parameters ..
      REAL               ZERO, ONE
      parameter( zero = 0.0e+0, one = 1.0e+0 )
*     ..
*     .. Local Scalars ..
      REAL               EPS, RAT
*     ..
*     .. External Functions ..
      REAL               SLAMCH
      EXTERNAL           slamch
*     ..
*     .. Intrinsic Functions ..
      INTRINSIC          max, min
*     ..
*     .. Executable Statements ..
*
      eps = slamch( '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
      sget06 = rat
      RETURN
*
*     End of SGET06
*

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