ILinearAlgebraOperations<T>.BandMultiplyAndAddInPlace Method

Sum of the product of a general band matrix and vector and a scaled vector.

Definition

Namespace: Numerics.NET.LinearAlgebra.Implementation
Assembly: Numerics.NET (in Numerics.NET.dll) Version: 9.0.4
C# 
void BandMultiplyAndAddInPlace(
	TransposeOperation transposeOperation,
	int m,
	int n,
	int kl,
	int ku,
	T alpha,
	ReadOnlySpan<T> a,
	int lda,
	ReadOnlySpan<T> x,
	int incx,
	T beta,
	Span<T> y,
	int incy
)

Parameters

transposeOperation  TransposeOperation
Specifies the operation to be performed on the matrix a.
m  Int32
The number of rows in the matrix a.
n  Int32
The number of columns in the matrix a.
kl  Int32
The lower bandwidth of the matrix a.
ku  Int32
The upper bandwidth of the matrix a.
alpha  T
The scalar used to multiply the matrix-vector product.
a  ReadOnlySpan<T>
A span that contains the elements of the matrix.
lda  Int32
The leading dimension of the matrix a.
x  ReadOnlySpan<T>
A span containing the elements of the vector x.
incx  Int32
The distance between elements in x.
beta  T
The scalar used to multiply y.
y  Span<T>
A span containing the elements of the vector y. The elements of y are overwritten with the result.
incy  Int32
The distance between elements in y.

Remarks

This method is similar to the BLAS routine DGBMV.

See Also