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* SB04PD EXAMPLE PROGRAM TEXT
* Copyright (c) 2002-2010 NICONET e.V.
*
* .. Parameters ..
INTEGER NIN, NOUT
PARAMETER ( NIN = 5, NOUT = 6 )
INTEGER MMAX, NMAX
PARAMETER ( MMAX = 20, NMAX = 20 )
INTEGER LDA, LDB, LDC, LDU, LDV
PARAMETER ( LDA = MMAX, LDB = NMAX, LDC = MMAX,
$ LDU = MMAX, LDV = NMAX )
INTEGER LDWORK
PARAMETER ( LDWORK = 1 + 2*MMAX + MAX( 3*MMAX, 5*NMAX,
$ 2*( NMAX + MMAX ) ) )
* .. Local Scalars ..
CHARACTER DICO, FACTA, FACTB, TRANA, TRANB
INTEGER I, INFO, ISGN, J, M, N
DOUBLE PRECISION SCALE
* .. Local Arrays ..
DOUBLE PRECISION A(LDA,MMAX), B(LDB,NMAX), C(LDC,NMAX),
$ DWORK(LDWORK), U(LDU,MMAX), V(LDV,NMAX)
* .. External Functions ..
LOGICAL LSAME
EXTERNAL LSAME
* .. External Subroutines ..
EXTERNAL SB04PD
* .. 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 = * ) M, N, ISGN, DICO, FACTA, FACTB, TRANA, TRANB
IF ( M.LT.0 .OR. M.GT.MMAX ) THEN
WRITE ( NOUT, FMT = 99992 ) M
ELSE
READ ( NIN, FMT = * ) ( ( A(I,J), J = 1,M ), I = 1,M )
IF ( LSAME( FACTA, 'F' ) )
$ READ ( NIN, FMT = * ) ( ( U(I,J), J = 1,M ), I = 1,M )
IF ( N.LT.0 .OR. N.GT.NMAX ) THEN
WRITE ( NOUT, FMT = 99991 ) N
ELSE
READ ( NIN, FMT = * ) ( ( B(I,J), J = 1,N ), I = 1,N )
IF ( LSAME( FACTB, 'F' ) )
$ READ ( NIN, FMT = * ) ( ( V(I,J), J = 1,N ), I = 1,N )
READ ( NIN, FMT = * ) ( ( C(I,J), J = 1,N ), I = 1,M )
* Find the solution matrix X.
CALL SB04PD( DICO, FACTA, FACTB, TRANA, TRANB, ISGN, M, N,
$ A, LDA, U, LDU, B, LDB, V, LDV, C, LDC, SCALE,
$ DWORK, LDWORK, INFO )
*
IF ( INFO.NE.0 )
$ WRITE ( NOUT, FMT = 99998 ) INFO
IF ( INFO.EQ.0 .OR. INFO.EQ.M+N+1 ) THEN
WRITE ( NOUT, FMT = 99997 )
DO 20 I = 1, M
WRITE ( NOUT, FMT = 99996 ) ( C(I,J), J = 1,N )
20 CONTINUE
WRITE ( NOUT, FMT = 99995 ) SCALE
IF ( LSAME( FACTA, 'N' ) ) THEN
WRITE ( NOUT, FMT = 99994 )
DO 40 I = 1, M
WRITE ( NOUT, FMT = 99996 ) ( U(I,J), J = 1,M )
40 CONTINUE
END IF
IF ( LSAME( FACTB, 'N' ) ) THEN
WRITE ( NOUT, FMT = 99993 )
DO 60 I = 1, N
WRITE ( NOUT, FMT = 99996 ) ( V(I,J), J = 1,N )
60 CONTINUE
END IF
END IF
END IF
END IF
STOP
*
99999 FORMAT (' SB04PD EXAMPLE PROGRAM RESULTS',/1X)
99998 FORMAT (' INFO on exit from SB04PD = ',I2)
99997 FORMAT (' The solution matrix X is ')
99996 FORMAT (20(1X,F8.4))
99995 FORMAT (/' Scaling factor = ',F8.4)
99994 FORMAT (/' The orthogonal matrix U is ')
99993 FORMAT (/' The orthogonal matrix V is ')
99992 FORMAT (/' M is out of range.',/' M = ',I5)
99991 FORMAT (/' N is out of range.',/' N = ',I5)
END
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