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C
C SPDX-License-Identifier: BSD-3-Clause
C
* TB05AD 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, LDG, LDHINV
PARAMETER ( LDA = NMAX, LDB = NMAX, LDC = PMAX, LDG = PMAX,
$ LDHINV = NMAX )
INTEGER LIWORK
PARAMETER ( LIWORK = NMAX )
INTEGER LDWORK
PARAMETER ( LDWORK = 2*NMAX )
INTEGER LZWORK
PARAMETER ( LZWORK = NMAX*( NMAX+2 ) )
* .. Local Scalars ..
COMPLEX*16 FREQ
DOUBLE PRECISION RCOND
INTEGER I, INFO, J, M, N, P
CHARACTER*1 BALEIG, INITA
LOGICAL LBALBA, LBALEA, LBALEB, LBALEC, LINITA
* .. Local Arrays ..
COMPLEX*16 G(LDG,MMAX), HINVB(LDHINV,MMAX), ZWORK(LZWORK)
DOUBLE PRECISION A(LDA,NMAX), B(LDB,MMAX), C(LDC,NMAX),
$ DWORK(LDWORK), EVIM(NMAX), EVRE(NMAX)
INTEGER IWORK(LIWORK)
* .. External Functions ..
LOGICAL LSAME
EXTERNAL LSAME
* .. External Subroutines ..
EXTERNAL TB05AD
* .. 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, FREQ, INITA, BALEIG
LBALEC = LSAME( BALEIG, 'C' )
LBALEB = LSAME( BALEIG, 'B' ) .OR. LSAME( BALEIG, 'E' )
LBALEA = LSAME( BALEIG, 'A' )
LBALBA = LBALEB.OR.LBALEA
LINITA = LSAME( INITA, 'G' )
IF ( N.LE.0 .OR. N.GT.NMAX ) THEN
WRITE ( NOUT, FMT = 99992 ) N
ELSE
READ ( NIN, FMT = * ) ( ( A(I,J), J = 1,N ), I = 1,N )
IF ( M.LE.0 .OR. M.GT.MMAX ) THEN
WRITE ( NOUT, FMT = 99991 ) M
ELSE
READ ( NIN, FMT = * ) ( ( B(I,J), J = 1,M ), I = 1,N )
IF ( P.LE.0 .OR. P.GT.PMAX ) THEN
WRITE ( NOUT, FMT = 99990 ) P
ELSE
READ ( NIN, FMT = * ) ( ( C(I,J), J = 1,N ), I = 1,P )
* Find the frequency response matrix of the ssr (A,B,C).
CALL TB05AD( BALEIG, INITA, N, M, P, FREQ, A, LDA, B,
$ LDB, C, LDC, RCOND, G, LDG, EVRE, EVIM,
$ HINVB, LDHINV, IWORK, DWORK, LDWORK, ZWORK,
$ LZWORK, INFO )
*
IF ( INFO.NE.0 ) THEN
WRITE ( NOUT, FMT = 99998 ) INFO
ELSE
IF ( ( LBALEC ) .OR. ( LBALEA ) ) WRITE ( NOUT,
$ FMT = 99997 ) RCOND
IF ( ( LINITA ) .AND. ( LBALBA ) )
$ WRITE ( NOUT, FMT = 99996 )
$ ( EVRE(I), EVIM(I), I = 1,N )
WRITE ( NOUT, FMT = 99995 )
DO 20 I = 1, P
WRITE ( NOUT, FMT = 99994 ) ( G(I,J), J = 1,M )
20 CONTINUE
WRITE ( NOUT, FMT = 99993 )
DO 40 I = 1, N
WRITE ( NOUT, FMT = 99994 ) ( HINVB(I,J), J = 1,M )
40 CONTINUE
END IF
END IF
END IF
END IF
STOP
*
99999 FORMAT (' TB05AD EXAMPLE PROGRAM RESULTS',/1X)
99998 FORMAT (' INFO on exit from TB05AD = ',I2)
99997 FORMAT (' RCOND = ',F4.2)
99996 FORMAT (/' Eigenvalues of the state transmission matrix A are ',
$ /(1X,2F7.2,'*j'))
99995 FORMAT (/' The frequency response matrix G(freq) is ')
99994 FORMAT (20(' (',F5.2,',',F5.2,') ',:))
99993 FORMAT (/' H(inverse)*B is ')
99992 FORMAT (/' N is out of range.',/' N = ',I5)
99991 FORMAT (/' M is out of range.',/' M = ',I5)
99990 FORMAT (/' P is out of range.',/' P = ',I5)
END
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