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* MB03TD EXAMPLE PROGRAM TEXT
*
* .. Parameters ..
DOUBLE PRECISION ZERO
PARAMETER ( ZERO = 0.0D0 )
INTEGER NIN, NOUT
PARAMETER ( NIN = 5, NOUT = 6 )
INTEGER NMAX
PARAMETER ( NMAX = 100 )
INTEGER LDA, LDG, LDRES, LDU1, LDU2, LDWORK
PARAMETER ( LDA = NMAX, LDG = NMAX, LDRES = NMAX,
$ LDU1 = NMAX, LDU2 = NMAX, LDWORK = 8*NMAX )
* .. Local Scalars ..
CHARACTER*1 COMPU, TYP
INTEGER I, INFO, J, N, M
* .. Local Arrays ..
LOGICAL LOWER(NMAX), SELECT(NMAX)
DOUBLE PRECISION A(LDA, NMAX), DWORK(LDWORK), G(LDG, NMAX),
$ RES(LDRES,NMAX), U1(LDU1,NMAX), U2(LDU2,NMAX),
$ WR(NMAX), WI(NMAX)
* .. External Functions ..
LOGICAL LSAME
DOUBLE PRECISION MA02JD
EXTERNAL LSAME, MA02JD
* .. External Subroutines ..
EXTERNAL MB03TD
* .. Executable Statements ..
WRITE ( NOUT, FMT = 99999 )
* Skip the heading in the data file and read the data.
READ ( NIN, FMT = '()' )
READ ( NIN, FMT = * ) N, TYP, COMPU
IF( N.LE.0 .OR. N.GT.NMAX ) THEN
WRITE ( NOUT, FMT = 99993 ) N
ELSE
READ ( NIN, FMT = * ) ( SELECT(J), J = 1,N )
READ ( NIN, FMT = * ) ( LOWER(J), J = 1,N )
READ ( NIN, FMT = * ) ( ( A(I,J), J = 1,N ), I = 1,N )
READ ( NIN, FMT = * ) ( ( G(I,J), J = 1,N ), I = 1,N )
IF ( LSAME( COMPU, 'U' ) ) THEN
READ ( NIN, FMT = * ) ( ( U1(I,J), J = 1,N ), I = 1,N )
READ ( NIN, FMT = * ) ( ( U2(I,J), J = 1,N ), I = 1,N )
END IF
CALL MB03TD( TYP, COMPU, SELECT, LOWER, N, A, LDA, G, LDG, U1,
$ LDU1, U2, LDU2, WR, WI, M, DWORK, LDWORK, INFO )
IF ( INFO.NE.0 ) THEN
WRITE ( NOUT, FMT = 99998 ) INFO
ELSE
IF ( LSAME( COMPU, 'U' ) ) THEN
WRITE ( NOUT, FMT = 99997 )
DO 10 I = 1, N
WRITE ( NOUT, FMT = 99994 )
$ ( U1(I,J), J = 1,N ), ( U2(I,J), J = 1,N )
10 CONTINUE
DO 20 I = 1, N
WRITE ( NOUT, FMT = 99994 )
$ ( -U2(I,J), J = 1,N ), ( U1(I,J), J = 1,N )
20 CONTINUE
WRITE ( NOUT, FMT = 99992 ) MA02JD( .FALSE., .FALSE., N,
$ U1, LDU1, U2, LDU2, RES, LDRES )
END IF
*
WRITE ( NOUT, FMT = 99996 )
DO 30 I = 1, N
WRITE ( NOUT, FMT = 99994 ) ( A(I,J), J = 1,N )
30 CONTINUE
*
WRITE ( NOUT, FMT = 99995 )
IF ( LSAME( TYP, 'S' ) ) THEN
DO 40 I = 1, N
WRITE ( NOUT, FMT = 99994 )
$ ( -G(J,I), J = 1,I-1 ), ZERO, ( G(I,J), J = I+1,N )
40 CONTINUE
ELSE
DO 50 I = 1, N
WRITE ( NOUT, FMT = 99994 )
$ ( G(J,I), J = 1,I-1 ), ( G(I,J), J = I,N )
50 CONTINUE
END IF
END IF
END IF
*
99999 FORMAT (' MB03TD EXAMPLE PROGRAM RESULTS',/1X)
99998 FORMAT (' INFO on exit from MB03TD = ',I2)
99997 FORMAT (' The orthogonal symplectic factor U is ')
99996 FORMAT (/' The matrix A in reordered Schur canonical form is ')
99995 FORMAT (/' The matrix G is ')
99994 FORMAT (20(1X,F9.4))
99993 FORMAT (/' N is out of range.',/' N = ',I5)
99992 FORMAT (/' Orthogonality of U: || U''*U - I ||_F = ',G7.2)
END
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