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version 1.11, 2012/12/14 14:22:40
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version 1.18, 2018/05/29 07:18:07
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| * |
* |
| * =========== DOCUMENTATION =========== |
* =========== DOCUMENTATION =========== |
| * |
* |
| * Online html documentation available at |
* Online html documentation available at |
| * http://www.netlib.org/lapack/explore-html/ |
* http://www.netlib.org/lapack/explore-html/ |
| * |
* |
| *> \htmlonly |
*> \htmlonly |
| *> Download DSTEVR + dependencies |
*> Download DSTEVR + dependencies |
| *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dstevr.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dstevr.f"> |
| *> [TGZ]</a> |
*> [TGZ]</a> |
| *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dstevr.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dstevr.f"> |
| *> [ZIP]</a> |
*> [ZIP]</a> |
| *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dstevr.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dstevr.f"> |
| *> [TXT]</a> |
*> [TXT]</a> |
| *> \endhtmlonly |
*> \endhtmlonly |
| * |
* |
| * Definition: |
* Definition: |
| * =========== |
* =========== |
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| * SUBROUTINE DSTEVR( JOBZ, RANGE, N, D, E, VL, VU, IL, IU, ABSTOL, |
* SUBROUTINE DSTEVR( JOBZ, RANGE, N, D, E, VL, VU, IL, IU, ABSTOL, |
| * M, W, Z, LDZ, ISUPPZ, WORK, LWORK, IWORK, |
* M, W, Z, LDZ, ISUPPZ, WORK, LWORK, IWORK, |
| * LIWORK, INFO ) |
* LIWORK, INFO ) |
| * |
* |
| * .. Scalar Arguments .. |
* .. Scalar Arguments .. |
| * CHARACTER JOBZ, RANGE |
* CHARACTER JOBZ, RANGE |
| * INTEGER IL, INFO, IU, LDZ, LIWORK, LWORK, M, N |
* INTEGER IL, INFO, IU, LDZ, LIWORK, LWORK, M, N |
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| * INTEGER ISUPPZ( * ), IWORK( * ) |
* INTEGER ISUPPZ( * ), IWORK( * ) |
| * DOUBLE PRECISION D( * ), E( * ), W( * ), WORK( * ), Z( LDZ, * ) |
* DOUBLE PRECISION D( * ), E( * ), W( * ), WORK( * ), Z( LDZ, * ) |
| * .. |
* .. |
| * |
* |
| * |
* |
| *> \par Purpose: |
*> \par Purpose: |
| * ============= |
* ============= |
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| *> \param[in] VL |
*> \param[in] VL |
| *> \verbatim |
*> \verbatim |
| *> VL is DOUBLE PRECISION |
*> VL is DOUBLE PRECISION |
| |
*> If RANGE='V', the lower bound of the interval to |
| |
*> be searched for eigenvalues. VL < VU. |
| |
*> Not referenced if RANGE = 'A' or 'I'. |
| *> \endverbatim |
*> \endverbatim |
| *> |
*> |
| *> \param[in] VU |
*> \param[in] VU |
| *> \verbatim |
*> \verbatim |
| *> VU is DOUBLE PRECISION |
*> VU is DOUBLE PRECISION |
| *> If RANGE='V', the lower and upper bounds of the interval to |
*> If RANGE='V', the upper bound of the interval to |
| *> be searched for eigenvalues. VL < VU. |
*> be searched for eigenvalues. VL < VU. |
| *> Not referenced if RANGE = 'A' or 'I'. |
*> Not referenced if RANGE = 'A' or 'I'. |
| *> \endverbatim |
*> \endverbatim |
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| *> \param[in] IL |
*> \param[in] IL |
| *> \verbatim |
*> \verbatim |
| *> IL is INTEGER |
*> IL is INTEGER |
| |
*> If RANGE='I', the index of the |
| |
*> smallest eigenvalue to be returned. |
| |
*> 1 <= IL <= IU <= N, if N > 0; IL = 1 and IU = 0 if N = 0. |
| |
*> Not referenced if RANGE = 'A' or 'V'. |
| *> \endverbatim |
*> \endverbatim |
| *> |
*> |
| *> \param[in] IU |
*> \param[in] IU |
| *> \verbatim |
*> \verbatim |
| *> IU is INTEGER |
*> IU is INTEGER |
| *> If RANGE='I', the indices (in ascending order) of the |
*> If RANGE='I', the index of the |
| *> smallest and largest eigenvalues to be returned. |
*> largest eigenvalue to be returned. |
| *> 1 <= IL <= IU <= N, if N > 0; IL = 1 and IU = 0 if N = 0. |
*> 1 <= IL <= IU <= N, if N > 0; IL = 1 and IU = 0 if N = 0. |
| *> Not referenced if RANGE = 'A' or 'V'. |
*> Not referenced if RANGE = 'A' or 'V'. |
| *> \endverbatim |
*> \endverbatim |
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| * Authors: |
* Authors: |
| * ======== |
* ======== |
| * |
* |
| *> \author Univ. of Tennessee |
*> \author Univ. of Tennessee |
| *> \author Univ. of California Berkeley |
*> \author Univ. of California Berkeley |
| *> \author Univ. of Colorado Denver |
*> \author Univ. of Colorado Denver |
| *> \author NAG Ltd. |
*> \author NAG Ltd. |
| * |
* |
| *> \date November 2011 |
*> \date June 2016 |
| * |
* |
| *> \ingroup doubleOTHEReigen |
*> \ingroup doubleOTHEReigen |
| * |
* |
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| $ M, W, Z, LDZ, ISUPPZ, WORK, LWORK, IWORK, |
$ M, W, Z, LDZ, ISUPPZ, WORK, LWORK, IWORK, |
| $ LIWORK, INFO ) |
$ LIWORK, INFO ) |
| * |
* |
| * -- LAPACK driver routine (version 3.4.0) -- |
* -- LAPACK driver routine (version 3.7.0) -- |
| * -- LAPACK is a software package provided by Univ. of Tennessee, -- |
* -- LAPACK is a software package provided by Univ. of Tennessee, -- |
| * -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- |
* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- |
| * November 2011 |
* June 2016 |
| * |
* |
| * .. Scalar Arguments .. |
* .. Scalar Arguments .. |
| CHARACTER JOBZ, RANGE |
CHARACTER JOBZ, RANGE |
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| * Scale matrix to allowable range, if necessary. |
* Scale matrix to allowable range, if necessary. |
| * |
* |
| ISCALE = 0 |
ISCALE = 0 |
| VLL = VL |
IF( VALEIG ) THEN |
| VUU = VU |
VLL = VL |
| |
VUU = VU |
| |
END IF |
| * |
* |
| TNRM = DLANST( 'M', N, D, E ) |
TNRM = DLANST( 'M', N, D, E ) |
| IF( TNRM.GT.ZERO .AND. TNRM.LT.RMIN ) THEN |
IF( TNRM.GT.ZERO .AND. TNRM.LT.RMIN ) THEN |
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