# clattp.f - Man Page

TESTING/LIN/clattp.f

## Synopsis

### Functions/Subroutines

subroutine **clattp** (imat, uplo, trans, diag, iseed, n, ap, b, work, rwork, info)**CLATTP**

## Function/Subroutine Documentation

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

**CLATTP**

**Purpose:**

CLATTP generates a triangular test matrix in packed storage. IMAT and UPLO uniquely specify the properties of the test matrix, which is returned in the array AP.

**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.

*AP*AP is COMPLEX array, dimension (N*(N+1)/2) The upper or lower triangular matrix A, packed columnwise in a linear array. The j-th column of A is stored in the array AP as follows: if UPLO = 'U', AP((j-1)*j/2 + i) = A(i,j) for 1<=i<=j; if UPLO = 'L', AP((j-1)*(n-j) + j*(j+1)/2 + i-j) = A(i,j) for j<=i<=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 **129** of file **clattp.f**.

## Author

Generated automatically by Doxygen for LAPACK from the source code.

## Referenced By

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

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