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C
C SPDX-License-Identifier: BSD-3-Clause
C
* AB05PD EXAMPLE PROGRAM TEXT
*
* .. Parameters ..
INTEGER NIN, NOUT
PARAMETER ( NIN = 5, NOUT = 6 )
INTEGER N1MAX, N2MAX, NMAX, MMAX, PMAX
PARAMETER ( N1MAX = 20, N2MAX = 20, NMAX = N1MAX+N2MAX,
$ MMAX = 20, PMAX = 20 )
INTEGER LDA, LDA1, LDA2, LDB, LDB1, LDB2, LDC, LDC1,
$ LDC2, LDD, LDD1, LDD2
PARAMETER ( LDA = NMAX, LDA1 = N1MAX, LDA2 = N2MAX,
$ LDB = NMAX, LDB1 = N1MAX, LDB2 = N2MAX,
$ LDC = PMAX, LDC1 = PMAX, LDC2 = PMAX,
$ LDD = PMAX, LDD1 = PMAX, LDD2 = PMAX )
* .. Local Scalars ..
CHARACTER*1 OVER
INTEGER I, INFO, J, M, N, N1, N2, P
DOUBLE PRECISION ALPHA
* .. Local Arrays ..
DOUBLE PRECISION A(LDA,NMAX), A1(LDA1,N1MAX), A2(LDA2,N2MAX),
$ B(LDB,MMAX), B1(LDB1,MMAX), B2(LDB2,MMAX),
$ C(LDC,NMAX), C1(LDC1,N1MAX), C2(LDC2,N2MAX),
$ D(LDD,MMAX), D1(LDD1,MMAX), D2(LDD2,MMAX)
* .. External Subroutines ..
EXTERNAL AB05PD
* .. Executable Statements ..
*
OVER = 'N'
WRITE ( NOUT, FMT = 99999 )
* Skip the heading in the data file and read the data.
READ ( NIN, FMT = '()' )
READ ( NIN, FMT = * ) N1, M, P, N2, ALPHA
IF ( N1.LE.0 .OR. N1.GT.N1MAX ) THEN
WRITE ( NOUT, FMT = 99992 ) N1
ELSE
READ ( NIN, FMT = * ) ( ( A1(I,J), J = 1,N1 ), I = 1,N1 )
IF ( M.LE.0 .OR. M.GT.MMAX ) THEN
WRITE ( NOUT, FMT = 99991 ) M
ELSE
READ ( NIN, FMT = * ) ( ( B1(I,J), I = 1,N1 ), J = 1,M )
IF ( P.LE.0 .OR. P.GT.PMAX ) THEN
WRITE ( NOUT, FMT = 99990 ) P
ELSE
READ ( NIN, FMT = * ) ( ( C1(I,J), J = 1,N1 ), I = 1,P )
READ ( NIN, FMT = * ) ( ( D1(I,J), J = 1,M ), I = 1,P )
IF ( N2.LE.0 .OR. N2.GT.N2MAX ) THEN
WRITE ( NOUT, FMT = 99989 ) N2
ELSE
READ ( NIN, FMT = * )
$ ( ( A2(I,J), J = 1,N2 ), I = 1,N2 )
READ ( NIN, FMT = * )
$ ( ( B2(I,J), I = 1,N2 ), J = 1,M )
READ ( NIN, FMT = * )
$ ( ( C2(I,J), J = 1,N2 ), I = 1,P )
READ ( NIN, FMT = * )
$ ( ( D2(I,J), J = 1,M ), I = 1,P )
* Find the state-space model (A,B,C,D).
CALL AB05PD( OVER, N1, M, P, N2, ALPHA, A1, LDA1, B1,
$ LDB1, C1, LDC1, D1, LDD1, A2, LDA2, B2,
$ LDB2, C2, LDC2, D2, LDD2, N, A, LDA, B,
$ LDB, C, LDC, D, LDD, INFO )
*
IF ( INFO.NE.0 ) THEN
WRITE ( NOUT, FMT = 99998 ) INFO
ELSE
WRITE ( NOUT, FMT = 99997 )
DO 20 I = 1, N
WRITE ( NOUT, FMT = 99996 )
$ ( A(I,J), J = 1,N )
20 CONTINUE
WRITE ( NOUT, FMT = 99995 )
DO 40 I = 1, N
WRITE ( NOUT, FMT = 99996 )
$ ( B(I,J), J = 1,M )
40 CONTINUE
WRITE ( NOUT, FMT = 99994 )
DO 60 I = 1, P
WRITE ( NOUT, FMT = 99996 )
$ ( C(I,J), J = 1,N )
60 CONTINUE
WRITE ( NOUT, FMT = 99993 )
DO 80 I = 1, P
WRITE ( NOUT, FMT = 99996 )
$ ( D(I,J), J = 1,M )
80 CONTINUE
END IF
END IF
END IF
END IF
END IF
STOP
*
99999 FORMAT (' AB05PD EXAMPLE PROGRAM RESULTS',/1X)
99998 FORMAT (' INFO on exit from AB05PD = ',I2)
99997 FORMAT (' The state transition matrix of the connected system is')
99996 FORMAT (20(1X,F8.4))
99995 FORMAT (/' The input/state matrix of the connected system is ')
99994 FORMAT (/' The state/output matrix of the connected system is ')
99993 FORMAT (/' The input/output matrix of the connected system is ')
99992 FORMAT (/' N1 is out of range.',/' N1 = ',I5)
99991 FORMAT (/' M is out of range.',/' M = ',I5)
99990 FORMAT (/' P is out of range.',/' P = ',I5)
99989 FORMAT (/' N2 is out of range.',/' N2 = ',I5)
END
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