naginterfaces.library.blas.dtrmm¶
- naginterfaces.library.blas.dtrmm(side, uplo, transa, diag, m, alpha, a, b)[source]¶
dtrmm
performs one of the matrix-matrix operationswhere is an real matrix, is a real triangular matrix, and is a real scalar.
For full information please refer to the NAG Library document for f06yf
https://support.nag.com/numeric/nl/nagdoc_30.2/flhtml/f06/f06yff.html
- Parameters
- sidestr, length 1
Specifies whether is operated on from the left or the right.
is pre-multiplied from the left.
is post-multiplied from the right.
- uplostr, length 1
Specifies whether is upper or lower triangular.
is upper triangular.
is lower triangular.
- transastr, length 1
Specifies whether the operation involves or .
The operation involves .
or
The operation involves .
- diagstr, length 1
Specifies whether has nonunit or unit diagonal elements.
The diagonal elements are stored explicitly.
The diagonal elements are assumed to be , and are not referenced.
- mint
, the number of rows of the matrix ; the order of if .
- alphafloat
The scalar .
- afloat, array-like, shape
Note: the required extent for this argument in dimension 1 is determined as follows: if : ; if : ; otherwise: .
Note: the required extent for this argument in dimension 2 is determined as follows: if : ; if : ; otherwise: .
The triangular matrix ; is if , or if .
- bfloat, array-like, shape
The matrix .
If , need not be set.
- Returns
- bfloat, ndarray, shape
The updated matrix .
- Raises
- NagValueError
- (errno )
On entry, error in parameter .
Constraint: or .
- (errno )
On entry, error in parameter .
Constraint: or .
- (errno )
On entry, error in parameter .
Constraint: , or .
- (errno )
On entry, error in parameter .
Constraint: or .
- (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.