version 1.11, 2012/07/31 11:06:36
|
version 1.21, 2018/05/29 06:55:19
|
Line 1
|
Line 1
|
*> \brief \b DLARRF |
*> \brief \b DLARRF finds a new relatively robust representation such that at least one of the eigenvalues is relatively isolated. |
* |
* |
* =========== 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 DLARRF + dependencies |
*> Download DLARRF + dependencies |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dlarrf.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dlarrf.f"> |
*> [TGZ]</a> |
*> [TGZ]</a> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dlarrf.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dlarrf.f"> |
*> [ZIP]</a> |
*> [ZIP]</a> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dlarrf.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dlarrf.f"> |
*> [TXT]</a> |
*> [TXT]</a> |
*> \endhtmlonly |
*> \endhtmlonly |
* |
* |
* Definition: |
* Definition: |
* =========== |
* =========== |
Line 22
|
Line 22
|
* W, WGAP, WERR, |
* W, WGAP, WERR, |
* SPDIAM, CLGAPL, CLGAPR, PIVMIN, SIGMA, |
* SPDIAM, CLGAPL, CLGAPR, PIVMIN, SIGMA, |
* DPLUS, LPLUS, WORK, INFO ) |
* DPLUS, LPLUS, WORK, INFO ) |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
* INTEGER CLSTRT, CLEND, INFO, N |
* INTEGER CLSTRT, CLEND, INFO, N |
* DOUBLE PRECISION CLGAPL, CLGAPR, PIVMIN, SIGMA, SPDIAM |
* DOUBLE PRECISION CLGAPL, CLGAPR, PIVMIN, SIGMA, SPDIAM |
Line 31
|
Line 31
|
* DOUBLE PRECISION D( * ), DPLUS( * ), L( * ), LD( * ), |
* DOUBLE PRECISION D( * ), DPLUS( * ), L( * ), LD( * ), |
* $ LPLUS( * ), W( * ), WGAP( * ), WERR( * ), WORK( * ) |
* $ LPLUS( * ), W( * ), WGAP( * ), WERR( * ), WORK( * ) |
* .. |
* .. |
* |
* |
* |
* |
*> \par Purpose: |
*> \par Purpose: |
* ============= |
* ============= |
Line 51
|
Line 51
|
*> \param[in] N |
*> \param[in] N |
*> \verbatim |
*> \verbatim |
*> N is INTEGER |
*> N is INTEGER |
*> The order of the matrix (subblock, if the matrix splitted). |
*> The order of the matrix (subblock, if the matrix split). |
*> \endverbatim |
*> \endverbatim |
*> |
*> |
*> \param[in] D |
*> \param[in] D |
Line 169
|
Line 169
|
* 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 auxOTHERauxiliary |
*> \ingroup OTHERauxiliary |
* |
* |
*> \par Contributors: |
*> \par Contributors: |
* ================== |
* ================== |
Line 193
|
Line 193
|
$ SPDIAM, CLGAPL, CLGAPR, PIVMIN, SIGMA, |
$ SPDIAM, CLGAPL, CLGAPR, PIVMIN, SIGMA, |
$ DPLUS, LPLUS, WORK, INFO ) |
$ DPLUS, LPLUS, WORK, INFO ) |
* |
* |
* -- LAPACK auxiliary routine (version 3.4.0) -- |
* -- LAPACK auxiliary routine (version 3.7.1) -- |
* -- 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 .. |
INTEGER CLSTRT, CLEND, INFO, N |
INTEGER CLSTRT, CLEND, INFO, N |
Line 239
|
Line 239
|
* .. Executable Statements .. |
* .. Executable Statements .. |
* |
* |
INFO = 0 |
INFO = 0 |
|
* |
|
* Quick return if possible |
|
* |
|
IF( N.LE.0 ) THEN |
|
RETURN |
|
END IF |
|
* |
FACT = DBLE(2**KTRYMAX) |
FACT = DBLE(2**KTRYMAX) |
EPS = DLAMCH( 'Precision' ) |
EPS = DLAMCH( 'Precision' ) |
SHIFT = 0 |
SHIFT = 0 |
Line 257
|
Line 264
|
|
|
* Decide whether the code should accept the best among all |
* Decide whether the code should accept the best among all |
* representations despite large element growth or signal INFO=1 |
* representations despite large element growth or signal INFO=1 |
NOFAIL = .TRUE. |
* Setting NOFAIL to .FALSE. for quick fix for bug 113 |
|
NOFAIL = .FALSE. |
* |
* |
|
|
* Compute the average gap length of the cluster |
* Compute the average gap length of the cluster |