version 1.1, 2010/08/07 13:21:05
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version 1.17, 2023/08/07 08:38:58
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SUBROUTINE DLASCL2 ( M, N, D, X, LDX ) |
*> \brief \b DLASCL2 performs diagonal scaling on a matrix. |
* |
* |
* -- LAPACK routine (version 3.2.1) -- |
* =========== DOCUMENTATION =========== |
* -- Contributed by James Demmel, Deaglan Halligan, Yozo Hida and -- |
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* -- Jason Riedy of Univ. of California Berkeley. -- |
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* -- April 2009 -- |
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* |
* |
* -- LAPACK is a software package provided by Univ. of Tennessee, -- |
* Online html documentation available at |
* -- Univ. of California Berkeley and NAG Ltd. -- |
* http://www.netlib.org/lapack/explore-html/ |
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* |
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*> \htmlonly |
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*> Download DLASCL2 + dependencies |
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*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dlascl2.f"> |
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*> [TGZ]</a> |
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*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dlascl2.f"> |
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*> [ZIP]</a> |
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*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dlascl2.f"> |
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*> [TXT]</a> |
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*> \endhtmlonly |
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* |
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* Definition: |
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* =========== |
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* |
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* SUBROUTINE DLASCL2 ( M, N, D, X, LDX ) |
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* |
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* .. Scalar Arguments .. |
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* INTEGER M, N, LDX |
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* .. |
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* .. Array Arguments .. |
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* DOUBLE PRECISION D( * ), X( LDX, * ) |
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* .. |
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* |
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* |
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*> \par Purpose: |
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* ============= |
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*> |
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*> \verbatim |
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*> |
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*> DLASCL2 performs a diagonal scaling on a matrix: |
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*> x <-- D * x |
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*> where the diagonal matrix D is stored as a vector. |
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*> |
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*> Eventually to be replaced by BLAS_dge_diag_scale in the new BLAS |
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*> standard. |
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*> \endverbatim |
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* |
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* Arguments: |
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* ========== |
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* |
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*> \param[in] M |
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*> \verbatim |
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*> M is INTEGER |
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*> The number of rows of D and X. M >= 0. |
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*> \endverbatim |
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*> |
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*> \param[in] N |
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*> \verbatim |
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*> N is INTEGER |
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*> The number of columns of X. N >= 0. |
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*> \endverbatim |
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*> |
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*> \param[in] D |
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*> \verbatim |
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*> D is DOUBLE PRECISION array, length M |
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*> Diagonal matrix D, stored as a vector of length M. |
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*> \endverbatim |
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*> |
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*> \param[in,out] X |
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*> \verbatim |
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*> X is DOUBLE PRECISION array, dimension (LDX,N) |
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*> On entry, the matrix X to be scaled by D. |
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*> On exit, the scaled matrix. |
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*> \endverbatim |
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*> |
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*> \param[in] LDX |
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*> \verbatim |
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*> LDX is INTEGER |
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*> The leading dimension of the matrix X. LDX >= M. |
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*> \endverbatim |
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* |
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* Authors: |
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* ======== |
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* |
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*> \author Univ. of Tennessee |
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*> \author Univ. of California Berkeley |
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*> \author Univ. of Colorado Denver |
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*> \author NAG Ltd. |
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* |
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*> \ingroup doubleOTHERcomputational |
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* |
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* ===================================================================== |
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SUBROUTINE DLASCL2 ( M, N, D, X, LDX ) |
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* |
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* -- LAPACK computational routine -- |
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* -- LAPACK is a software package provided by Univ. of Tennessee, -- |
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* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- |
* |
* |
IMPLICIT NONE |
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* .. |
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* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
INTEGER M, N, LDX |
INTEGER M, N, LDX |
* .. |
* .. |
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DOUBLE PRECISION D( * ), X( LDX, * ) |
DOUBLE PRECISION D( * ), X( LDX, * ) |
* .. |
* .. |
* |
* |
* Purpose |
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* ======= |
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* |
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* DLASCL2 performs a diagonal scaling on a vector: |
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* x <-- D * x |
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* where the diagonal matrix D is stored as a vector. |
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* |
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* Eventually to be replaced by BLAS_dge_diag_scale in the new BLAS |
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* standard. |
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* |
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* Arguments |
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* ========= |
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* |
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* M (input) INTEGER |
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* The number of rows of D and X. M >= 0. |
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* |
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* N (input) INTEGER |
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* The number of columns of D and X. N >= 0. |
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* |
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* D (input) DOUBLE PRECISION array, length M |
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* Diagonal matrix D, stored as a vector of length M. |
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* |
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* X (input/output) DOUBLE PRECISION array, dimension (LDX,N) |
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* On entry, the vector X to be scaled by D. |
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* On exit, the scaled vector. |
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* |
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* LDX (input) INTEGER |
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* The leading dimension of the vector X. LDX >= 0. |
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* |
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* ===================================================================== |
* ===================================================================== |
* |
* |
* .. Local Scalars .. |
* .. Local Scalars .. |