LinearAlgebraOperations.MultiplyAndAddInPlace Method

Definition

Namespace: Numerics.NET.LinearAlgebra
Assembly: Numerics.NET (in Numerics.NET.dll) Version: 9.0.3

Overload List

MultiplyAndAddInPlace<T, TStorage>(Int32, T, TStorage, TStorage)

Evaluates a vector plus the product of a scalar and a vector
C#
public static void MultiplyAndAddInPlace<T, TStorage>(
	int n,
	T alpha,
	TStorage x,
	TStorage y
)
where TStorage : Object, IStorageSlice<T>

Parameters

n  Int32
The number of elements in the vectors x and y.
alpha  T
The scalar value used to multiply the elements of x.
x  TStorage
A reference to a one-dimensional array containing the elements of the vector x.
y  TStorage
A reference to a one-dimensional array containing the elements of the vector y. The elements of y are overwritten with the result.

Type Parameters

T
TStorage

MultiplyAndAddInPlace<T, TStorage, TStorage2D>(TransposeOperation, Int32, Int32, T, TStorage2D, TStorage, T, TStorage)

Sum of the product of a general matrix and vector and a scaled vector.
C#
public static void MultiplyAndAddInPlace<T, TStorage, TStorage2D>(
	TransposeOperation transposeOperation,
	int m,
	int n,
	T alpha,
	TStorage2D a,
	TStorage x,
	T beta,
	TStorage y
)
where TStorage : Object, IStorageSlice<T>
where TStorage2D : Object, IStorage2D<T>

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.
alpha  T
The scalar used to multiply the matrix-vector product.
a  TStorage2D
A span that contains the elements of the matrix.
x  TStorage
A reference to a one-dimensional array containing the elements of the vector x.
beta  T
The scalar used to multiply y.
y  TStorage
A reference to a one-dimensional array containing the elements of the vector y. The elements of y are overwritten with the result.

Type Parameters

T
TStorage
TStorage2D

Remarks

This method is similar to the BLAS routine DGEMV.

MultiplyAndAddInPlace<T, TStorage2D>(TransposeOperation, TransposeOperation, Int32, Int32, Int32, T, TStorage2D, TStorage2D, T, TStorage2D)

Sum of the product of two general matrices and a scaled matrix.
C#
public static void MultiplyAndAddInPlace<T, TStorage2D>(
	TransposeOperation transA,
	TransposeOperation transB,
	int m,
	int n,
	int k,
	T alpha,
	TStorage2D a,
	TStorage2D b,
	T beta,
	TStorage2D c
)
where TStorage2D : Object, IStorage2D<T>

Parameters

transA  TransposeOperation
Specifies the operation to be performed on the matrix a.
transB  TransposeOperation
Specifies the operation to be performed on the matrix b.
m  Int32
The number of rows in the matrix a transformed as specified by transA, and the matrix c.
n  Int32
The number of columns in the matrix b transformed as specified by transB, and the matrix c.
k  Int32
The number of columns in the matrix a transformed as specified by transA, and the number of rows of the matrix b transformed as specified by transB.
alpha  T
The scalar used to multiply the matrix-vector product.
a  TStorage2D
A span that contains the elements of the first matrix.
b  TStorage2D
A span that contains the elements of the second matrix.
beta  T
The scalar used to multiply c.
c  TStorage2D
A span that contains the elements of the third matrix.

Type Parameters

T
TStorage2D

See Also