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C
C SPDX-License-Identifier: BSD-3-Clause
C
* MB02JD EXAMPLE PROGRAM TEXT
*
* .. Parameters ..
INTEGER NIN, NOUT
PARAMETER ( NIN = 5, NOUT = 6 )
INTEGER KMAX, LMAX, MMAX, NMAX
PARAMETER ( KMAX = 10, LMAX = 10, MMAX = 20, NMAX = 20 )
INTEGER LDR, LDQ, LDTC, LDTR, LDWORK
PARAMETER ( LDR = NMAX*LMAX, LDQ = MMAX*KMAX,
$ LDTC = MMAX*KMAX, LDTR = KMAX,
$ LDWORK = ( MMAX*KMAX + NMAX*LMAX )
$ *( LMAX + 2*KMAX ) + 6*LMAX
$ + MMAX*KMAX + NMAX*LMAX )
* .. Local Scalars ..
INTEGER I, INFO, J, K, L, M, N, S
CHARACTER JOB
* .. Local Arrays ..
DOUBLE PRECISION DWORK(LDWORK), Q(LDQ,NMAX*LMAX),
$ R(LDR,NMAX*LMAX), TC(LDTC,LMAX),
$ TR(LDTR,NMAX*LMAX)
* .. External Functions ..
LOGICAL LSAME
EXTERNAL LSAME
* .. External Subroutines ..
EXTERNAL MB02JD
* .. Intrinsic Functions ..
INTRINSIC MIN
*
* .. Executable Statements ..
WRITE ( NOUT, FMT = 99999 )
* Skip the heading in the data file and read the data.
READ ( NIN, FMT = '()' )
READ ( NIN, FMT = * ) K, L, M, N, JOB
IF( K.LE.0 .OR. K.GT.KMAX ) THEN
WRITE ( NOUT, FMT = 99994 ) K
ELSE IF( L.LE.0 .OR. L.GT.LMAX ) THEN
WRITE ( NOUT, FMT = 99993 ) L
ELSE IF( M.LE.0 .OR. M.GT.MMAX ) THEN
WRITE ( NOUT, FMT = 99992 ) M
ELSE IF( N.LE.0 .OR. N.GT.NMAX ) THEN
WRITE ( NOUT, FMT = 99991 ) N
ELSE
READ ( NIN, FMT = * ) ( ( TC(I,J), J = 1,L ), I = 1,M*K )
READ ( NIN, FMT = * ) ( ( TR(I,J), J = 1,( N - 1 )*L ),
$ I = 1,K )
S = ( MIN( M*K, N*L ) + L - 1 ) / L
* Compute the required part of the QR factorization.
CALL MB02JD( JOB, K, L, M, N, 0, S, TC, LDTC, TR, LDTR, Q, LDQ,
$ R, LDR, DWORK, LDWORK, INFO )
IF ( INFO.NE.0 ) THEN
WRITE ( NOUT, FMT = 99998 ) INFO
ELSE
IF ( LSAME( JOB, 'Q' ) ) THEN
WRITE ( NOUT, FMT = 99997 )
DO 10 I = 1, M*K
WRITE ( NOUT, FMT = 99995 )
$ ( Q(I,J), J = 1, MIN( N*L, M*K ) )
10 CONTINUE
END IF
WRITE ( NOUT, FMT = 99996 )
DO 20 I = 1, N*L
WRITE ( NOUT, FMT = 99995 )
$ ( R(I,J), J = 1, MIN( N*L, M*K ) )
20 CONTINUE
END IF
END IF
*
STOP
*
99999 FORMAT (' MB02JD EXAMPLE PROGRAM RESULTS',/1X)
99998 FORMAT (' INFO on exit from MB02JD = ',I2)
99997 FORMAT (/' The factor Q is ')
99996 FORMAT (/' The factor R is ')
99995 FORMAT (20(1X,F8.4))
99994 FORMAT (/' K is out of range.',/' K = ',I5)
99993 FORMAT (/' L is out of range.',/' L = ',I5)
99992 FORMAT (/' M is out of range.',/' M = ',I5)
99991 FORMAT (/' N is out of range.',/' N = ',I5)
END
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