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* MB02QD EXAMPLE PROGRAM TEXT
* Copyright (c) 2002-2010 NICONET e.V.
*
* .. Parameters ..
INTEGER NIN, NOUT
PARAMETER ( NIN = 5, NOUT = 6 )
INTEGER NMAX, MMAX, NRHSMX
PARAMETER ( NMAX = 20, MMAX = 20, NRHSMX = 20 )
INTEGER LDA, LDB
PARAMETER ( LDA = MMAX, LDB = MAX( MMAX, NMAX ) )
INTEGER LDWORK
PARAMETER ( LDWORK = MAX( MIN( MMAX, NMAX) + 3*NMAX + 1,
$ 2*MIN( MMAX, NMAX) + NRHSMX ) )
* .. Local Scalars ..
DOUBLE PRECISION RCOND, SVLMAX
INTEGER I, INFO, J, M, N, NRHS, RANK
CHARACTER*1 INIPER, JOB
* .. Local Arrays ..
INTEGER JPVT(NMAX)
DOUBLE PRECISION A(LDA,NMAX), B(LDB,NRHSMX), DWORK(LDWORK),
$ SVAL(3), Y(NMAX*NRHSMX)
* .. External Functions ..
LOGICAL LSAME
EXTERNAL LSAME
* .. External Subroutines ..
EXTERNAL MB02QD
* .. Intrinsic Functions ..
INTRINSIC MAX, MIN
* .. 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, NRHS, RCOND, SVLMAX, JOB, INIPER
IF ( M.LT.0 .OR. M.GT.MMAX ) THEN
WRITE ( NOUT, FMT = 99994 ) M
ELSE
IF ( N.LT.0 .OR. N.GT.NMAX ) THEN
WRITE ( NOUT, FMT = 99993 ) N
ELSE
IF ( NRHS.LT.0 .OR. NRHS.GT.NRHSMX ) THEN
WRITE ( NOUT, FMT = 99992 ) NRHS
ELSE
READ ( NIN, FMT = * ) ( ( A(I,J), J = 1,N ), I = 1,M )
READ ( NIN, FMT = * ) ( ( B(I,J), J = 1,NRHS ), I = 1,M )
IF ( LSAME( JOB, 'F' ) )
$ READ ( NIN, FMT = * ) ( Y(I), I = 1,N*NRHS )
IF ( LSAME( INIPER, 'P' ) )
$ READ ( NIN, FMT = * ) ( JPVT(I), I = 1,N )
* Find the least squares solution.
CALL MB02QD( JOB, INIPER, M, N, NRHS, RCOND, SVLMAX, A,
$ LDA, B, LDB, Y, JPVT, RANK, SVAL, DWORK,
$ LDWORK, INFO )
*
IF ( INFO.NE.0 ) THEN
WRITE ( NOUT, FMT = 99998 ) INFO
ELSE
WRITE ( NOUT, FMT = 99997 ) RANK, SVAL
WRITE ( NOUT, FMT = 99996 )
DO 10 I = 1, N
WRITE ( NOUT, FMT = 99995 ) ( B(I,J), J = 1,NRHS )
10 CONTINUE
END IF
END IF
END IF
END IF
STOP
*
99999 FORMAT (' MB02QD EXAMPLE PROGRAM RESULTS',/1X)
99998 FORMAT (' INFO on exit from MB02QD =',I2)
99997 FORMAT (' The effective rank of A =',I2,/
$ ' Estimates of the singular values SVAL = '/3(1X,F8.4))
99996 FORMAT (' The least squares solution is')
99995 FORMAT (20(1X,F8.4))
99994 FORMAT (/' M is out of range.',/' M = ',I5)
99993 FORMAT (/' N is out of range.',/' N = ',I5)
99992 FORMAT (/' NRHS is out of range.',/' NRHS = ',I5)
END
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