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C
C SPDX-License-Identifier: BSD-3-Clause
C
* MB02GD EXAMPLE PROGRAM TEXT
*
* .. Parameters ..
INTEGER NIN, NOUT
PARAMETER ( NIN = 5, NOUT = 6 )
INTEGER KMAX, NMAX, NLMAX
PARAMETER ( KMAX = 15, NMAX = 15, NLMAX = 15 )
INTEGER LDRB, LDT, LDWORK
PARAMETER ( LDRB = ( NLMAX + 1 )*KMAX, LDT = KMAX*NMAX,
$ LDWORK = ( NLMAX + 1 )*KMAX*KMAX +
$ ( 3 + NLMAX )*KMAX )
* .. Local Scalars ..
INTEGER I, J, INFO, K, M, N, NL, SIZR
CHARACTER TRIU, TYPET
* .. Local Arrays dimensioned for TYPET = 'R' ..
DOUBLE PRECISION DWORK(LDWORK), RB(LDRB, NMAX*KMAX),
$ T(LDT, NMAX*KMAX)
* .. External Functions ..
LOGICAL LSAME
EXTERNAL LSAME
* .. External Subroutines ..
EXTERNAL MB02GD
*
* .. Executable Statements ..
WRITE ( NOUT, FMT = 99999 )
* Skip the heading in the data file and read the data.
READ ( NIN, FMT = '()' )
READ ( NIN, FMT = * ) K, N, NL, TRIU
TYPET = 'R'
M = ( NL + 1 )*K
IF( N.LE.0 .OR. N.GT.NMAX ) THEN
WRITE ( NOUT, FMT = 99995 ) N
ELSE IF( NL.LE.0 .OR. NL.GT.NLMAX ) THEN
WRITE ( NOUT, FMT = 99994 ) NL
ELSE IF( K.LE.0 .OR. K.GT.KMAX ) THEN
WRITE ( NOUT, FMT = 99993 ) K
ELSE
READ ( NIN, FMT = * ) ( ( T(I,J), J = 1,M ), I = 1,K )
* Compute the banded Cholesky factor.
CALL MB02GD( TYPET, TRIU, K, N, NL, 0, N, T, LDT, RB, LDRB,
$ DWORK, LDWORK, INFO )
*
IF ( INFO.NE.0 ) THEN
WRITE ( NOUT, FMT = 99998 ) INFO
ELSE
WRITE ( NOUT, FMT = 99997 )
IF ( LSAME( TRIU, 'T' ) ) THEN
SIZR = NL*K + 1
ELSE
SIZR = ( NL + 1 )*K
END IF
DO 10 I = 1, SIZR
WRITE ( NOUT, FMT = 99996 ) ( RB(I,J), J = 1, N*K )
10 CONTINUE
END IF
END IF
STOP
*
99999 FORMAT (' MB02GD EXAMPLE PROGRAM RESULTS',/1X)
99998 FORMAT (' INFO on exit from MB02GD = ',I2)
99997 FORMAT (/' The upper Cholesky factor in banded storage format ')
99996 FORMAT (20(1X,F8.4))
99995 FORMAT (/' N is out of range.',/' N = ',I5)
99994 FORMAT (/' NL is out of range.',/' NL = ',I5)
99993 FORMAT (/' K is out of range.',/' K = ',I5)
END