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* AB13CD EXAMPLE PROGRAM TEXT
* Copyright (c) 2002-2010 NICONET e.V.
*
* .. Parameters ..
INTEGER NIN, NOUT
PARAMETER ( NIN = 5, NOUT = 6 )
INTEGER NMAX, MMAX, PMAX
PARAMETER ( NMAX = 10, MMAX = 10, PMAX = 10 )
INTEGER LDA, LDB, LDC, LDD
PARAMETER ( LDA = NMAX, LDB = NMAX, LDC = PMAX,
$ LDD = PMAX )
INTEGER LIWORK
PARAMETER ( LIWORK = NMAX )
INTEGER LCWORK
PARAMETER ( LCWORK = ( NMAX + MMAX )*( NMAX + PMAX ) +
$ 3*MAX( MMAX, PMAX ) )
INTEGER LDWORK
PARAMETER ( LDWORK = 4*NMAX*NMAX + 2*MMAX*MMAX +
$ 2*PMAX*PMAX + 3*NMAX*MMAX +
$ 2*NMAX*PMAX + MMAX*PMAX + 10*NMAX +
$ 6*MAX( MMAX, PMAX ) )
* .. Local Scalars ..
DOUBLE PRECISION FPEAK, HNORM, TOL
INTEGER I, INFO, J, M, N, NP
* .. Local Arrays ..
LOGICAL BWORK(2*NMAX)
INTEGER IWORK(LIWORK)
DOUBLE PRECISION A(LDA,NMAX), B(LDB,MMAX), C(LDC,NMAX),
$ D(LDD,MMAX), DWORK(LDWORK)
COMPLEX*16 CWORK( LCWORK )
* .. External Functions ..
DOUBLE PRECISION AB13CD
EXTERNAL AB13CD
* .. 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, NP
IF ( N.LT.0 .OR. N.GT.NMAX ) THEN
WRITE ( NOUT, FMT = 99990 ) N
ELSE IF ( M.LT.0 .OR. M.GT.MMAX ) THEN
WRITE ( NOUT, FMT = 99989 ) M
ELSE IF ( NP.LT.0 .OR. NP.GT.PMAX ) THEN
WRITE ( NOUT, FMT = 99988 ) NP
ELSE
READ ( NIN, FMT = * ) ( ( A(I,J), J = 1,N ), I = 1,N )
READ ( NIN, FMT = * ) ( ( B(I,J), J = 1,M ), I = 1,N )
READ ( NIN, FMT = * ) ( ( C(I,J), J = 1,N ), I = 1,NP )
READ ( NIN, FMT = * ) ( ( D(I,J), J = 1,M ), I = 1,NP )
READ ( NIN, FMT = * ) TOL
* Computing the Hinf norm
HNORM = AB13CD( N, M, NP, A, LDA, B, LDB, C, LDC, D, LDD, TOL,
$ IWORK, DWORK, LDWORK, CWORK, LCWORK, BWORK,
$ INFO )
*
IF ( INFO.EQ.0 ) THEN
WRITE ( NOUT, FMT = 99997 )
WRITE ( NOUT, FMT = 99991 ) HNORM
FPEAK = DWORK(2)
WRITE ( NOUT, FMT = 99996 )
WRITE ( NOUT, FMT = 99991 ) FPEAK
ELSE
WRITE( NOUT, FMT = 99998 ) INFO
END IF
END IF
STOP
*
99999 FORMAT (' AB13CD EXAMPLE PROGRAM RESULTS',/1X)
99998 FORMAT (/' INFO on exit from AB13CD =',I2)
99997 FORMAT (/' The H_infty norm of the system is'/)
99996 FORMAT (/' The peak frequency is'/)
99992 FORMAT (10(1X,F8.4))
99991 FORMAT (D17.10)
99990 FORMAT (/' N is out of range.',/' N = ',I5)
99989 FORMAT (/' M is out of range.',/' M = ',I5)
99988 FORMAT (/' NP is out of range.',/' NP = ',I5)
END
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