TESTING/LIN/dlattb.f(3)    Library Functions Manual    TESTING/LIN/dlattb.f(3)

NAME
       TESTING/LIN/dlattb.f

SYNOPSIS
   Functions/Subroutines
       subroutine dlattb (imat, uplo, trans, diag, iseed, n, kd, ab, ldab, b,
           work, info)
           DLATTB

Function/Subroutine Documentation
   subroutine dlattb (integer imat, character uplo, character trans, character
       diag, integer, dimension( 4 ) iseed, integer n, integer kd, double
       precision, dimension( ldab, * ) ab, integer ldab, double precision,
       dimension( * ) b, double precision, dimension( * ) work, integer info)
       DLATTB

       Purpose:


            DLATTB generates a triangular test matrix in 2-dimensional storage.
            IMAT and UPLO uniquely specify the properties of the test matrix,
            which is returned in the array A.

       Parameters
           IMAT

                     IMAT is INTEGER
                     An integer key describing which matrix to generate for this
                     path.

           UPLO

                     UPLO is CHARACTER*1
                     Specifies whether the matrix A will be upper or lower
                     triangular.
                     = 'U':  Upper triangular
                     = 'L':  Lower triangular

           TRANS

                     TRANS is CHARACTER*1
                     Specifies whether the matrix or its transpose will be used.
                     = 'N':  No transpose
                     = 'T':  Transpose
                     = 'C':  Conjugate transpose (= transpose)

           DIAG

                     DIAG is CHARACTER*1
                     Specifies whether or not the matrix A is unit triangular.
                     = 'N':  Non-unit triangular
                     = 'U':  Unit triangular

           ISEED

                     ISEED is INTEGER array, dimension (4)
                     The seed vector for the random number generator (used in
                     DLATMS).  Modified on exit.

           N

                     N is INTEGER
                     The order of the matrix to be generated.

           KD

                     KD is INTEGER
                     The number of superdiagonals or subdiagonals of the banded
                     triangular matrix A.  KD >= 0.

           AB

                     AB is DOUBLE PRECISION array, dimension (LDAB,N)
                     The upper or lower triangular banded matrix A, stored in the
                     first KD+1 rows of AB.  Let j be a column of A, 1<=j<=n.
                     If UPLO = 'U', AB(kd+1+i-j,j) = A(i,j) for max(1,j-kd)<=i<=j.
                     If UPLO = 'L', AB(1+i-j,j)    = A(i,j) for j<=i<=min(n,j+kd).

           LDAB

                     LDAB is INTEGER
                     The leading dimension of the array AB.  LDAB >= KD+1.

           B

                     B is DOUBLE PRECISION array, dimension (N)

           WORK

                     WORK is DOUBLE PRECISION array, dimension (2*N)

           INFO

                     INFO is INTEGER
                     = 0:  successful exit
                     < 0: if INFO = -k, the k-th argument had an illegal value

       Author
           Univ. of Tennessee

           Univ. of California Berkeley

           Univ. of Colorado Denver

           NAG Ltd.

       Definition at line 133 of file dlattb.f.

Author
       Generated automatically by Doxygen for LAPACK from the source code.

LAPACK                          Version 3.12.0         TESTING/LIN/dlattb.f(3)