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author | jofret | 2009-04-28 07:17:00 +0000 |
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committer | jofret | 2009-04-28 07:17:00 +0000 |
commit | 8c8d2f518968ce7057eec6aa5cd5aec8faab861a (patch) | |
tree | 3dd1788b71d6a3ce2b73d2d475a3133580e17530 /src/lib/lapack/dggbak.f | |
parent | 9f652ffc16a310ac6641a9766c5b9e2671e0e9cb (diff) | |
download | scilab2c-8c8d2f518968ce7057eec6aa5cd5aec8faab861a.tar.gz scilab2c-8c8d2f518968ce7057eec6aa5cd5aec8faab861a.tar.bz2 scilab2c-8c8d2f518968ce7057eec6aa5cd5aec8faab861a.zip |
Moving lapack to right place
Diffstat (limited to 'src/lib/lapack/dggbak.f')
-rw-r--r-- | src/lib/lapack/dggbak.f | 220 |
1 files changed, 0 insertions, 220 deletions
diff --git a/src/lib/lapack/dggbak.f b/src/lib/lapack/dggbak.f deleted file mode 100644 index 8ed9fbd4..00000000 --- a/src/lib/lapack/dggbak.f +++ /dev/null @@ -1,220 +0,0 @@ - SUBROUTINE DGGBAK( JOB, SIDE, N, ILO, IHI, LSCALE, RSCALE, M, V, - $ LDV, INFO ) -* -* -- LAPACK routine (version 3.1) -- -* Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. -* November 2006 -* -* .. Scalar Arguments .. - CHARACTER JOB, SIDE - INTEGER IHI, ILO, INFO, LDV, M, N -* .. -* .. Array Arguments .. - DOUBLE PRECISION LSCALE( * ), RSCALE( * ), V( LDV, * ) -* .. -* -* Purpose -* ======= -* -* DGGBAK forms the right or left eigenvectors of a real generalized -* eigenvalue problem A*x = lambda*B*x, by backward transformation on -* the computed eigenvectors of the balanced pair of matrices output by -* DGGBAL. -* -* Arguments -* ========= -* -* JOB (input) CHARACTER*1 -* Specifies the type of backward transformation required: -* = 'N': do nothing, return immediately; -* = 'P': do backward transformation for permutation only; -* = 'S': do backward transformation for scaling only; -* = 'B': do backward transformations for both permutation and -* scaling. -* JOB must be the same as the argument JOB supplied to DGGBAL. -* -* SIDE (input) CHARACTER*1 -* = 'R': V contains right eigenvectors; -* = 'L': V contains left eigenvectors. -* -* N (input) INTEGER -* The number of rows of the matrix V. N >= 0. -* -* ILO (input) INTEGER -* IHI (input) INTEGER -* The integers ILO and IHI determined by DGGBAL. -* 1 <= ILO <= IHI <= N, if N > 0; ILO=1 and IHI=0, if N=0. -* -* LSCALE (input) DOUBLE PRECISION array, dimension (N) -* Details of the permutations and/or scaling factors applied -* to the left side of A and B, as returned by DGGBAL. -* -* RSCALE (input) DOUBLE PRECISION array, dimension (N) -* Details of the permutations and/or scaling factors applied -* to the right side of A and B, as returned by DGGBAL. -* -* M (input) INTEGER -* The number of columns of the matrix V. M >= 0. -* -* V (input/output) DOUBLE PRECISION array, dimension (LDV,M) -* On entry, the matrix of right or left eigenvectors to be -* transformed, as returned by DTGEVC. -* On exit, V is overwritten by the transformed eigenvectors. -* -* LDV (input) INTEGER -* The leading dimension of the matrix V. LDV >= max(1,N). -* -* INFO (output) INTEGER -* = 0: successful exit. -* < 0: if INFO = -i, the i-th argument had an illegal value. -* -* Further Details -* =============== -* -* See R.C. Ward, Balancing the generalized eigenvalue problem, -* SIAM J. Sci. Stat. Comp. 2 (1981), 141-152. -* -* ===================================================================== -* -* .. Local Scalars .. - LOGICAL LEFTV, RIGHTV - INTEGER I, K -* .. -* .. External Functions .. - LOGICAL LSAME - EXTERNAL LSAME -* .. -* .. External Subroutines .. - EXTERNAL DSCAL, DSWAP, XERBLA -* .. -* .. Intrinsic Functions .. - INTRINSIC MAX -* .. -* .. Executable Statements .. -* -* Test the input parameters -* - RIGHTV = LSAME( SIDE, 'R' ) - LEFTV = LSAME( SIDE, 'L' ) -* - INFO = 0 - IF( .NOT.LSAME( JOB, 'N' ) .AND. .NOT.LSAME( JOB, 'P' ) .AND. - $ .NOT.LSAME( JOB, 'S' ) .AND. .NOT.LSAME( JOB, 'B' ) ) THEN - INFO = -1 - ELSE IF( .NOT.RIGHTV .AND. .NOT.LEFTV ) THEN - INFO = -2 - ELSE IF( N.LT.0 ) THEN - INFO = -3 - ELSE IF( ILO.LT.1 ) THEN - INFO = -4 - ELSE IF( N.EQ.0 .AND. IHI.EQ.0 .AND. ILO.NE.1 ) THEN - INFO = -4 - ELSE IF( N.GT.0 .AND. ( IHI.LT.ILO .OR. IHI.GT.MAX( 1, N ) ) ) - $ THEN - INFO = -5 - ELSE IF( N.EQ.0 .AND. ILO.EQ.1 .AND. IHI.NE.0 ) THEN - INFO = -5 - ELSE IF( M.LT.0 ) THEN - INFO = -8 - ELSE IF( LDV.LT.MAX( 1, N ) ) THEN - INFO = -10 - END IF - IF( INFO.NE.0 ) THEN - CALL XERBLA( 'DGGBAK', -INFO ) - RETURN - END IF -* -* Quick return if possible -* - IF( N.EQ.0 ) - $ RETURN - IF( M.EQ.0 ) - $ RETURN - IF( LSAME( JOB, 'N' ) ) - $ RETURN -* - IF( ILO.EQ.IHI ) - $ GO TO 30 -* -* Backward balance -* - IF( LSAME( JOB, 'S' ) .OR. LSAME( JOB, 'B' ) ) THEN -* -* Backward transformation on right eigenvectors -* - IF( RIGHTV ) THEN - DO 10 I = ILO, IHI - CALL DSCAL( M, RSCALE( I ), V( I, 1 ), LDV ) - 10 CONTINUE - END IF -* -* Backward transformation on left eigenvectors -* - IF( LEFTV ) THEN - DO 20 I = ILO, IHI - CALL DSCAL( M, LSCALE( I ), V( I, 1 ), LDV ) - 20 CONTINUE - END IF - END IF -* -* Backward permutation -* - 30 CONTINUE - IF( LSAME( JOB, 'P' ) .OR. LSAME( JOB, 'B' ) ) THEN -* -* Backward permutation on right eigenvectors -* - IF( RIGHTV ) THEN - IF( ILO.EQ.1 ) - $ GO TO 50 -* - DO 40 I = ILO - 1, 1, -1 - K = RSCALE( I ) - IF( K.EQ.I ) - $ GO TO 40 - CALL DSWAP( M, V( I, 1 ), LDV, V( K, 1 ), LDV ) - 40 CONTINUE -* - 50 CONTINUE - IF( IHI.EQ.N ) - $ GO TO 70 - DO 60 I = IHI + 1, N - K = RSCALE( I ) - IF( K.EQ.I ) - $ GO TO 60 - CALL DSWAP( M, V( I, 1 ), LDV, V( K, 1 ), LDV ) - 60 CONTINUE - END IF -* -* Backward permutation on left eigenvectors -* - 70 CONTINUE - IF( LEFTV ) THEN - IF( ILO.EQ.1 ) - $ GO TO 90 - DO 80 I = ILO - 1, 1, -1 - K = LSCALE( I ) - IF( K.EQ.I ) - $ GO TO 80 - CALL DSWAP( M, V( I, 1 ), LDV, V( K, 1 ), LDV ) - 80 CONTINUE -* - 90 CONTINUE - IF( IHI.EQ.N ) - $ GO TO 110 - DO 100 I = IHI + 1, N - K = LSCALE( I ) - IF( K.EQ.I ) - $ GO TO 100 - CALL DSWAP( M, V( I, 1 ), LDV, V( K, 1 ), LDV ) - 100 CONTINUE - END IF - END IF -* - 110 CONTINUE -* - RETURN -* -* End of DGGBAK -* - END |