zlattr.f - Man Page

subroutine zlattr (imat, uplo, trans, diag, iseed, n, a, lda, b, work, rwork, info)
ZLATTR

ZLATTR

Purpose:

 ZLATTR 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

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
          ZLATMS).  Modified on exit.

N

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

A

          A is COMPLEX*16 array, dimension (LDA,N)
          The triangular matrix A.  If UPLO = 'U', the leading N x N
          upper triangular part of the array A contains the upper
          triangular matrix, and the strictly lower triangular part of
          A is not referenced.  If UPLO = 'L', the leading N x N lower
          triangular part of the array A contains the lower triangular
          matrix and the strictly upper triangular part of A is not
          referenced.

LDA

          LDA is INTEGER
          The leading dimension of the array A.  LDA >= max(1,N).

B

          B is COMPLEX*16 array, dimension (N)
          The right hand side vector, if IMAT > 10.

WORK

          WORK is COMPLEX*16 array, dimension (2*N)

RWORK

          RWORK is DOUBLE PRECISION array, dimension (N)

INFO

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

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line 136 of file zlattr.f.