version 1.9, 2011/07/22 07:38:13
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version 1.21, 2023/08/07 08:39:14
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*> \brief \b ILADLR scans a matrix for its last non-zero row. |
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* |
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* =========== DOCUMENTATION =========== |
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* |
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* Online html documentation available at |
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* http://www.netlib.org/lapack/explore-html/ |
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* |
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*> \htmlonly |
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*> Download ILADLR + dependencies |
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*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/iladlr.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/iladlr.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/iladlr.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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* INTEGER FUNCTION ILADLR( M, N, A, LDA ) |
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* |
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* .. Scalar Arguments .. |
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* INTEGER M, N, LDA |
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* .. |
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* .. Array Arguments .. |
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* DOUBLE PRECISION A( LDA, * ) |
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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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*> ILADLR scans A for its last non-zero row. |
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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 the matrix A. |
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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 the matrix A. |
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*> \endverbatim |
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*> |
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*> \param[in] A |
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*> \verbatim |
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*> A is DOUBLE PRECISION array, dimension (LDA,N) |
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*> The m by n matrix A. |
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*> \endverbatim |
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*> |
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*> \param[in] LDA |
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*> \verbatim |
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*> LDA is INTEGER |
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*> The leading dimension of the array A. LDA >= max(1,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 OTHERauxiliary |
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* |
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* ===================================================================== |
INTEGER FUNCTION ILADLR( M, N, A, LDA ) |
INTEGER FUNCTION ILADLR( M, N, A, LDA ) |
IMPLICIT NONE |
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* |
* |
* -- LAPACK auxiliary routine (version 3.3.1) -- |
* -- LAPACK auxiliary routine -- |
* -- 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..-- |
* -- April 2011 -- |
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* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
INTEGER M, N, LDA |
INTEGER M, N, LDA |
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DOUBLE PRECISION A( LDA, * ) |
DOUBLE PRECISION A( LDA, * ) |
* .. |
* .. |
* |
* |
* Purpose |
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* ======= |
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* |
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* ILADLR scans A for its last non-zero row. |
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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 the matrix A. |
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* |
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* N (input) INTEGER |
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* The number of columns of the matrix A. |
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* |
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* A (input) DOUBLE PRECISION array, dimension (LDA,N) |
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* The m by n matrix A. |
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* |
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* LDA (input) INTEGER |
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* The leading dimension of the array A. LDA >= max(1,M). |
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* |
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* ===================================================================== |
* ===================================================================== |
* |
* |
* .. Parameters .. |
* .. Parameters .. |
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ILADLR = 0 |
ILADLR = 0 |
DO J = 1, N |
DO J = 1, N |
I=M |
I=M |
DO WHILE ((A(I,J).NE.ZERO).AND.(I.GE.1)) |
DO WHILE((A(MAX(I,1),J).EQ.ZERO).AND.(I.GE.1)) |
I=I-1 |
I=I-1 |
ENDDO |
ENDDO |
ILADLR = MAX( ILADLR, I ) |
ILADLR = MAX( ILADLR, I ) |
END DO |
END DO |