version 1.9, 2011/11/21 22:19:32
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version 1.14, 2015/11/26 11:44:17
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*> \brief \b DLALS0 |
*> \brief \b DLALS0 applies back multiplying factors in solving the least squares problem using divide and conquer SVD approach. Used by sgelsd. |
* |
* |
* =========== DOCUMENTATION =========== |
* =========== DOCUMENTATION =========== |
* |
* |
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*> \author Univ. of Colorado Denver |
*> \author Univ. of Colorado Denver |
*> \author NAG Ltd. |
*> \author NAG Ltd. |
* |
* |
*> \date November 2011 |
*> \date November 2015 |
* |
* |
*> \ingroup doubleOTHERcomputational |
*> \ingroup doubleOTHERcomputational |
* |
* |
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$ PERM, GIVPTR, GIVCOL, LDGCOL, GIVNUM, LDGNUM, |
$ PERM, GIVPTR, GIVCOL, LDGCOL, GIVNUM, LDGNUM, |
$ POLES, DIFL, DIFR, Z, K, C, S, WORK, INFO ) |
$ POLES, DIFL, DIFR, Z, K, C, S, WORK, INFO ) |
* |
* |
* -- LAPACK computational routine (version 3.4.0) -- |
* -- LAPACK computational routine (version 3.6.0) -- |
* -- 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 |
* November 2015 |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
INTEGER GIVPTR, ICOMPQ, INFO, K, LDB, LDBX, LDGCOL, |
INTEGER GIVPTR, ICOMPQ, INFO, K, LDB, LDBX, LDGCOL, |
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* Test the input parameters. |
* Test the input parameters. |
* |
* |
INFO = 0 |
INFO = 0 |
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N = NL + NR + 1 |
* |
* |
IF( ( ICOMPQ.LT.0 ) .OR. ( ICOMPQ.GT.1 ) ) THEN |
IF( ( ICOMPQ.LT.0 ) .OR. ( ICOMPQ.GT.1 ) ) THEN |
INFO = -1 |
INFO = -1 |
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INFO = -3 |
INFO = -3 |
ELSE IF( ( SQRE.LT.0 ) .OR. ( SQRE.GT.1 ) ) THEN |
ELSE IF( ( SQRE.LT.0 ) .OR. ( SQRE.GT.1 ) ) THEN |
INFO = -4 |
INFO = -4 |
END IF |
ELSE IF( NRHS.LT.1 ) THEN |
* |
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N = NL + NR + 1 |
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* |
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IF( NRHS.LT.1 ) THEN |
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INFO = -5 |
INFO = -5 |
ELSE IF( LDB.LT.N ) THEN |
ELSE IF( LDB.LT.N ) THEN |
INFO = -7 |
INFO = -7 |