NAME

TESTING/LIN/zlattr.f

SYNOPSIS

Functions/Subroutines

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

Function/Subroutine Documentation

subroutine zlattr (integer imat, character uplo, character trans, character diag, integer, dimension( 4 ) iseed, integer n, complex16, dimension( lda, ) a, integer lda, complex16, dimension( ) b, complex16, dimension( ) work, double precision, dimension( * ) rwork, integer info)

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 is INTEGER


          The order of the matrix to be generated.



          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 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.

Author