DenseMatrix<T>.MultiplyByTranspose Method

[ObsoleteAttribute("Use the SymmetricMatrix<T>.FromOuterProduct method instead.")]
public SymmetricMatrix<T> MultiplyByTranspose()

<ObsoleteAttribute("Use the SymmetricMatrix<T>.FromOuterProduct method instead.")>
Public Function MultiplyByTranspose As SymmetricMatrix(Of T)

public:
[ObsoleteAttribute(L"Use the SymmetricMatrix<T>.FromOuterProduct method instead.")]
SymmetricMatrix<T>^ MultiplyByTranspose()

[<ObsoleteAttribute("Use the SymmetricMatrix<T>.FromOuterProduct method instead.")>]
member MultiplyByTranspose : unit -> SymmetricMatrix<'T> 

Return Value

Some applications, for example the solution of a least squares problem using normal equations, require the product of a matrix with its own transpose. This method performs this operation.

The resulting matrix is always symmetrical and positive definite. This is why a SymmetricMatrix<T> is returned, rather than a more general DenseMatrix<T>.

This method uses the BLAS routine DSYRK.

Reference