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* SG03BD EXAMPLE PROGRAM TEXT
*
* .. Parameters ..
INTEGER NIN, NOUT
PARAMETER ( NIN = 5, NOUT = 6 )
INTEGER NMAX
PARAMETER ( NMAX = 20 )
INTEGER LDA, LDB, LDE, LDQ, LDZ
PARAMETER ( LDA = NMAX, LDB = NMAX, LDE = NMAX,
$ LDQ = NMAX, LDZ = NMAX )
INTEGER LDWORK
PARAMETER ( LDWORK = MAX( 1, 4*NMAX, 6*NMAX-6 ) )
* .. Local Scalars ..
CHARACTER*1 DICO, FACT, TRANS
DOUBLE PRECISION SCALE
INTEGER I, INFO, J, N, M
* .. Local Arrays ..
DOUBLE PRECISION A(LDA,NMAX), ALPHAI(NMAX), ALPHAR(NMAX),
$ B(LDB,NMAX), BETA(NMAX), DWORK(LDWORK),
$ E(LDE,NMAX), Q(LDQ,NMAX), Z(LDZ,NMAX)
* .. External Functions ..
LOGICAL LSAME
EXTERNAL LSAME
* .. External Subroutines ..
EXTERNAL SG03BD
* .. 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 = * ) N, M, DICO, FACT, TRANS
IF ( N.LT.0 .OR. N.GT.NMAX ) THEN
WRITE ( NOUT, FMT = 99995 ) N
ELSE IF ( M.LT.0 .OR. M.GT.NMAX ) THEN
WRITE ( NOUT, FMT = 99994 ) M
ELSE
READ ( NIN, FMT = * ) ( ( A(I,J), J = 1,N ), I = 1,N )
READ ( NIN, FMT = * ) ( ( E(I,J), J = 1,N ), I = 1,N )
IF ( LSAME( FACT, 'F' ) ) THEN
READ ( NIN, FMT = * ) ( ( Q(I,J), J = 1,N ), I = 1,N )
READ ( NIN, FMT = * ) ( ( Z(I,J), J = 1,N ), I = 1,N )
END IF
IF ( LSAME( FACT, 'T' ) ) THEN
READ ( NIN, FMT = * ) ( ( B(I,J), J = 1,M ), I = 1,N )
ELSE
READ ( NIN, FMT = * ) ( ( B(I,J), J = 1,N ), I = 1,M )
END IF
* Find the Cholesky factor U of the solution matrix.
CALL SG03BD( DICO, FACT, TRANS, N, M, A, LDA, E, LDE, Q, LDQ,
$ Z, LDZ, B, LDB, SCALE, ALPHAR, ALPHAI, BETA,
$ DWORK, LDWORK, INFO )
*
IF ( INFO.NE.0 ) THEN
WRITE ( NOUT, FMT = 99998 ) INFO
ELSE
WRITE ( NOUT, FMT = 99997 ) SCALE
DO 20 I = 1, N
WRITE ( NOUT, FMT = 99996 ) ( B(I,J), J = 1,N )
20 CONTINUE
END IF
END IF
STOP
*
99999 FORMAT (' SG03BD EXAMPLE PROGRAM RESULTS',/1X)
99998 FORMAT (' INFO on exit from SG03BD = ',I2)
99997 FORMAT (' SCALE = ',F8.4,//' The Cholesky factor U of the solution
$ matrix is')
99996 FORMAT (20(1X,F8.4))
99995 FORMAT (/' N is out of range.',/' N = ',I5)
99994 FORMAT (/' M is out of range.',/' M = ',I5)
END
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