# clattr.f - Man Page

TESTING/LIN/clattr.f

## Synopsis

### Functions/Subroutines

subroutine **clattr** (imat, uplo, trans, diag, iseed, n, a, lda, b, work, rwork, info)**CLATTR**

## Function/Subroutine Documentation

### subroutine clattr (integer imat, character uplo, character trans, character diag, integer, dimension( 4 ) iseed, integer n, complex, dimension( lda, * ) a, integer lda, complex, dimension( * ) b, complex, dimension( * ) work, real, dimension( * ) rwork, integer info)

**CLATTR**

**Purpose:**

CLATTR 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 CLATMS). Modified on exit.

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

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

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

*RWORK*RWORK is REAL 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 **clattr.f**.

## Author

Generated automatically by Doxygen for LAPACK from the source code.

## Referenced By

The man page clattr(3) is an alias of clattr.f(3).

Tue Nov 28 2023 12:08:42 Version 3.12.0 LAPACK