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version 1.16, 2017/06/17 10:53:53
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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 DLAHQR + dependencies |
*> Download DLAHQR + dependencies |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dlahqr.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dlahqr.f"> |
*> [TGZ]</a> |
*> [TGZ]</a> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dlahqr.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dlahqr.f"> |
*> [ZIP]</a> |
*> [ZIP]</a> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dlahqr.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dlahqr.f"> |
*> [TXT]</a> |
*> [TXT]</a> |
*> \endhtmlonly |
*> \endhtmlonly |
* |
* |
* Definition: |
* Definition: |
* =========== |
* =========== |
* |
* |
* SUBROUTINE DLAHQR( WANTT, WANTZ, N, ILO, IHI, H, LDH, WR, WI, |
* SUBROUTINE DLAHQR( WANTT, WANTZ, N, ILO, IHI, H, LDH, WR, WI, |
* ILOZ, IHIZ, Z, LDZ, INFO ) |
* ILOZ, IHIZ, Z, LDZ, INFO ) |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
* INTEGER IHI, IHIZ, ILO, ILOZ, INFO, LDH, LDZ, N |
* INTEGER IHI, IHIZ, ILO, ILOZ, INFO, LDH, LDZ, N |
* LOGICAL WANTT, WANTZ |
* LOGICAL WANTT, WANTZ |
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* .. Array Arguments .. |
* .. Array Arguments .. |
* DOUBLE PRECISION H( LDH, * ), WI( * ), WR( * ), Z( LDZ, * ) |
* DOUBLE PRECISION H( LDH, * ), WI( * ), WR( * ), Z( LDZ, * ) |
* .. |
* .. |
* |
* |
* |
* |
*> \par Purpose: |
*> \par Purpose: |
* ============= |
* ============= |
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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 2015 |
*> \date December 2016 |
* |
* |
*> \ingroup doubleOTHERauxiliary |
*> \ingroup doubleOTHERauxiliary |
* |
* |
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SUBROUTINE DLAHQR( WANTT, WANTZ, N, ILO, IHI, H, LDH, WR, WI, |
SUBROUTINE DLAHQR( WANTT, WANTZ, N, ILO, IHI, H, LDH, WR, WI, |
$ ILOZ, IHIZ, Z, LDZ, INFO ) |
$ ILOZ, IHIZ, Z, LDZ, INFO ) |
* |
* |
* -- LAPACK auxiliary routine (version 3.6.0) -- |
* -- LAPACK auxiliary 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 2015 |
* December 2016 |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
INTEGER IHI, IHIZ, ILO, ILOZ, INFO, LDH, LDZ, N |
INTEGER IHI, IHIZ, ILO, ILOZ, INFO, LDH, LDZ, N |
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* |
* |
* ITMAX is the total number of QR iterations allowed. |
* ITMAX is the total number of QR iterations allowed. |
* |
* |
ITMAX = 30 * MAX( 10, NH ) |
ITMAX = 30 * MAX( 10, NH ) |
* |
* |
* The main loop begins here. I is the loop index and decreases from |
* The main loop begins here. I is the loop index and decreases from |
* IHI to ILO in steps of 1 or 2. Each iteration of the loop works |
* IHI to ILO in steps of 1 or 2. Each iteration of the loop works |