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* AB13ID EXAMPLE PROGRAM TEXT
*
* .. Parameters ..
INTEGER NIN, NOUT
PARAMETER ( NIN = 5, NOUT = 6 )
INTEGER NMAX, MMAX, PMAX
PARAMETER ( NMAX = 20, MMAX = 20, PMAX = 20 )
INTEGER LDA, LDB, LDC, LDE
PARAMETER ( LDA = NMAX, LDB = NMAX,
$ LDC = MAX( MMAX, PMAX ), LDE = NMAX )
INTEGER LDWORK, LIWORK
PARAMETER ( LDWORK = 2*NMAX*NMAX +
$ MAX( 2*( NMAX*( NMAX + MMAX + PMAX ) +
$ MAX( MMAX, PMAX ) + NMAX - 1 ),
$ 10*NMAX + MAX( NMAX, 23 ) ),
$ LIWORK = 2*NMAX + MAX( MMAX, PMAX ) + 7 )
* .. Local Scalars ..
LOGICAL LISPRP
CHARACTER CKSING, EQUIL, JOBEIG, JOBSYS, RESTOR, UPDATE
INTEGER I, INFO, IWARN, J, M, N, NO, NR, P, RANKE
* .. Local Arrays ..
INTEGER IWORK(LIWORK)
DOUBLE PRECISION A(LDA,NMAX), B(LDB,MAX(MMAX,PMAX)), C(LDC,NMAX),
$ DWORK(LDWORK), E(LDE,NMAX), TOL(3)
* .. External Functions ..
LOGICAL AB13ID, LSAME
EXTERNAL AB13ID, LSAME
* .. Intrinsic Functions ..
INTRINSIC MAX
* .. Executable Statements ..
*
WRITE ( NOUT, FMT = 99999 )
* Skip the heading in the data file and read the data.
READ ( NIN, FMT = '()' )
READ ( NIN, FMT = * ) N, M, P, TOL(1), TOL(2), TOL(3), JOBSYS,
$ JOBEIG, EQUIL, CKSING, RESTOR, UPDATE
IF ( N.LT.0 .OR. N.GT.NMAX ) THEN
WRITE ( NOUT, FMT = 99988 ) N
ELSE
READ ( NIN, FMT = * ) ( ( A(I,J), J = 1,N ), I = 1,N )
READ ( NIN, FMT = * ) ( ( E(I,J), J = 1,N ), I = 1,N )
IF ( M.LT.0 .OR. M.GT.MMAX ) THEN
WRITE ( NOUT, FMT = 99987 ) M
ELSE
READ ( NIN, FMT = * ) ( ( B(I,J), J = 1,M ), I = 1,N )
IF ( P.LT.0 .OR. P.GT.PMAX ) THEN
WRITE ( NOUT, FMT = 99986 ) P
ELSE
READ ( NIN, FMT = * ) ( ( C(I,J), J = 1,N ), I = 1,P )
* Check whether the transfer function of the descriptor
* system is proper.
LISPRP = AB13ID( JOBSYS, JOBEIG, EQUIL, CKSING, RESTOR,
$ UPDATE, N, M, P, A, LDA, E, LDE, B, LDB,
$ C, LDC, NR, RANKE, TOL, IWORK, DWORK,
$ LDWORK, IWARN, INFO )
*
IF ( INFO.NE.0 ) THEN
WRITE ( NOUT, FMT = 99998 ) INFO
ELSE
IF ( LISPRP ) THEN
WRITE ( NOUT, FMT = 99991 )
ELSE
WRITE ( NOUT, FMT = 99990 )
END IF
WRITE ( NOUT, FMT = 99994 ) NR
WRITE ( NOUT, FMT = 99989 ) RANKE
IF ( LSAME( JOBSYS, 'N' ).AND.( LSAME( JOBEIG, 'A' )
$ .OR.LSAME( UPDATE, 'U' ) ) ) THEN
NO = N
ELSE
NO = NR
END IF
WRITE ( NOUT, FMT = 99997 )
DO 10 I = 1, NO
WRITE ( NOUT, FMT = 99995 ) ( A(I,J), J = 1,NO )
10 CONTINUE
WRITE ( NOUT, FMT = 99996 )
DO 20 I = 1, NR
WRITE ( NOUT, FMT = 99995 ) ( E(I,J), J = 1,NR )
20 CONTINUE
IF ( LSAME( JOBSYS, 'N' ).AND.LSAME( JOBEIG, 'I' )
$ .AND.LSAME( EQUIL, 'S' )
$ .AND.LSAME( UPDATE, 'N' ) )
$ NO = N
WRITE ( NOUT, FMT = 99993 )
DO 30 I = 1, NR
WRITE ( NOUT, FMT = 99995 ) ( B(I,J), J = 1,M )
30 CONTINUE
WRITE ( NOUT, FMT = 99992 )
DO 40 I = 1, P
WRITE ( NOUT, FMT = 99995 ) ( C(I,J), J = 1,NR )
40 CONTINUE
IF ( IWARN.NE.0 )
$ WRITE ( NOUT, FMT = 99998 ) IWARN
END IF
END IF
END IF
END IF
STOP
*
99999 FORMAT (' AB13ID EXAMPLE PROGRAM RESULTS',/1X)
99998 FORMAT (' INFO on exit from AB13ID = ',I2)
99997 FORMAT (/' The reduced state dynamics matrix Ar is ')
99996 FORMAT (/' The reduced descriptor matrix Er is ')
99995 FORMAT (20(1X,F8.4))
99994 FORMAT (/' Order of reduced system =', I5 )
99993 FORMAT (/' The reduced input/state matrix Br is ')
99992 FORMAT (/' The reduced state/output matrix Cr is ')
99991 FORMAT ( ' The system is proper')
99990 FORMAT ( ' The system is improper')
99989 FORMAT (' Rank of matrix E =', I5 )
99988 FORMAT (/' N is out of range.',/' N = ',I5)
99987 FORMAT (/' M is out of range.',/' M = ',I5)
99986 FORMAT (/' P is out of range.',/' P = ',I5)
END
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