zlattp.f - Man Page

TESTING/LIN/zlattp.f

Synopsis

Functions/Subroutines

subroutine zlattp (imat, uplo, trans, diag, iseed, n, ap, b, work, rwork, info)
ZLATTP

Function/Subroutine Documentation

subroutine zlattp (integer imat, character uplo, character trans, character diag, integer, dimension( 4 ) iseed, integer n, complex*16, dimension( * ) ap, complex*16, dimension( * ) b, complex*16, dimension( * ) work, double precision, dimension( * ) rwork, integer info)

ZLATTP

Purpose:

``` ZLATTP 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
ZLATMS).  Modified on exit.```

N

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

AP

```          AP is COMPLEX*16 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*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

NAG Ltd.

Definition at line 129 of file zlattp.f.

Author

Generated automatically by Doxygen for LAPACK from the source code.

Referenced By

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

Tue Nov 28 2023 12:08:43 Version 3.12.0 LAPACK