naginterfaces.library.blas.zhpmv¶
- naginterfaces.library.blas.zhpmv(uplo, alpha, ap, x, beta, y=None)[source]¶
zhpmv
computes the matrix-vector product for a complex Hermitian matrix stored in packed form.For full information please refer to the NAG Library document for f06se
https://support.nag.com/numeric/nl/nagdoc_30.1/flhtml/f06/f06sef.html
- Parameters
- uplostr, length 1
Specifies whether the upper or lower triangular part of is stored.
The upper triangular part of is stored.
The lower triangular part of is stored.
- alphacomplex
The scalar .
- apcomplex, array-like, shape
The Hermitian matrix , packed by columns.
- xcomplex, array-like, shape
The -element vector .
- betacomplex
The scalar .
- yNone or complex, array-like, shape , optional
The -element vector , if , need not be set.
- Returns
- ycomplex, ndarray, shape
The updated vector .
- Raises
- NagValueError
- (errno )
On entry, error in parameter .
Constraint: or .
- (errno )
On entry, error in parameter .
Constraint: .
- (errno )
On entry, error in parameter .
Constraint: .
- (errno )
On entry, error in parameter .
Constraint: .
- Notes
In the NAG Library the traditional C interface for this routine uses a different algorithmic base. Please contact NAG if you have any questions about compatibility.
zhpmv
performs the matrix-vector operationwhere is an complex Hermitian matrix stored in packed form, and are -element complex vectors, and and are complex scalars.