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C
C SPDX-License-Identifier: BSD-3-Clause
C
* TB01PD EXAMPLE PROGRAM TEXT
*
* .. Parameters ..
INTEGER NIN, NOUT
PARAMETER ( NIN = 5, NOUT = 6 )
INTEGER NMAX, MMAX, PMAX
PARAMETER ( NMAX = 20, MMAX = 20, PMAX = 20 )
INTEGER MAXMP
PARAMETER ( MAXMP = MAX( MMAX, PMAX ) )
INTEGER LDA, LDB, LDC
PARAMETER ( LDA = NMAX, LDB = NMAX, LDC = MAXMP )
INTEGER LIWORK
PARAMETER ( LIWORK = NMAX+MAXMP )
INTEGER LDWORK
PARAMETER ( LDWORK = NMAX+MAX( NMAX, 3*MAXMP ) )
* .. Local Scalars ..
DOUBLE PRECISION TOL
INTEGER I, INFO, J, M, N, NR, P
CHARACTER JOB, EQUIL
* .. Local Arrays ..
DOUBLE PRECISION A(LDA,NMAX), B(LDB,MAXMP), C(LDC,NMAX),
$ DWORK(LDWORK)
INTEGER IWORK(LIWORK)
* .. External Subroutines ..
EXTERNAL TB01PD
* .. 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, JOB, EQUIL
IF ( N.LT.0 .OR. N.GT.NMAX ) THEN
WRITE ( NOUT, FMT = 99990 ) N
ELSE
READ ( NIN, FMT = * ) ( ( A(I,J), J = 1,N ), I = 1,N )
IF ( M.LT.0 .OR. M.GT.MMAX ) THEN
WRITE ( NOUT, FMT = 99989 ) M
ELSE
READ ( NIN, FMT = * ) ( ( B(I,J), I = 1,N ), J = 1,M )
IF ( P.LT.0 .OR. P.GT.PMAX ) THEN
WRITE ( NOUT, FMT = 99988 ) P
ELSE
READ ( NIN, FMT = * ) ( ( C(I,J), J = 1,N ), I = 1,P )
* Find a minimal ssr for (A,B,C).
CALL TB01PD( JOB, EQUIL, N, M, P, A, LDA, B, LDB, C, LDC,
$ NR, TOL, IWORK, DWORK, LDWORK, INFO )
*
IF ( INFO.NE.0 ) THEN
WRITE ( NOUT, FMT = 99998 ) INFO
ELSE
WRITE ( NOUT, FMT = 99997 ) NR
WRITE ( NOUT, FMT = 99996 )
DO 20 I = 1, NR
WRITE ( NOUT, FMT = 99995 ) ( A(I,J), J = 1,NR )
20 CONTINUE
WRITE ( NOUT, FMT = 99993 )
DO 40 I = 1, NR
WRITE ( NOUT, FMT = 99995 ) ( B(I,J), J = 1,M )
40 CONTINUE
WRITE ( NOUT, FMT = 99992 )
DO 60 I = 1, P
WRITE ( NOUT, FMT = 99995 ) ( C(I,J), J = 1,NR )
60 CONTINUE
END IF
END IF
END IF
END IF
STOP
*
99999 FORMAT (' TB01PD EXAMPLE PROGRAM RESULTS',/1X)
99998 FORMAT (' INFO on exit from TB01PD = ',I2)
99997 FORMAT (' The order of the minimal realization = ',I2)
99996 FORMAT (/' The transformed state dynamics matrix of a minimal re',
$ 'alization is ')
99995 FORMAT (20(1X,F8.4))
99993 FORMAT (/' The transformed input/state matrix of a minimal reali',
$ 'zation is ')
99992 FORMAT (/' The transformed state/output matrix of a minimal real',
$ 'ization is ')
99990 FORMAT (/' N is out of range.',/' N = ',I5)
99989 FORMAT (/' M is out of range.',/' M = ',I5)
99988 FORMAT (/' P is out of range.',/' P = ',I5)
END
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