*> \brief \b SGET06 * * =========== DOCUMENTATION =========== * * Online html documentation available at * http://www.netlib.org/lapack/explore-html/ * * Definition: * =========== * * REAL FUNCTION SGET06( RCOND, RCONDC ) * * .. Scalar Arguments .. * REAL RCOND, RCONDC * .. * * *> \par Purpose: * ============= *> *> \verbatim *> *> SGET06 computes a test ratio to compare two values for RCOND. *> \endverbatim * * Arguments: * ========== * *> \param[in] RCOND *> \verbatim *> RCOND is REAL *> The estimate of the reciprocal of the condition number of A, *> as computed by SGECON. *> \endverbatim *> *> \param[in] RCONDC *> \verbatim *> RCONDC is REAL *> The reciprocal of the condition number of A, computed as *> ( 1/norm(A) ) / norm(inv(A)). *> \endverbatim * * Authors: * ======== * *> \author Univ. of Tennessee *> \author Univ. of California Berkeley *> \author Univ. of Colorado Denver *> \author NAG Ltd. * *> \ingroup single_lin * * ===================================================================== REAL FUNCTION SGET06( RCOND, RCONDC ) * * -- LAPACK test routine -- * -- LAPACK is a software package provided by Univ. of Tennessee, -- * -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- * * .. 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 * END