Struct nalgebra::linalg::Hessenberg
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pub struct Hessenberg<N: Real, D: DimSub<U1>> where
DefaultAllocator: Allocator<N, D, D> + Allocator<N, DimDiff<D, U1>>, { /* fields omitted */ }
Hessenberg decomposition of a general matrix.
Methods
impl<N: Real, D: DimSub<U1>> Hessenberg<N, D> where
DefaultAllocator: Allocator<N, D, D> + Allocator<N, D> + Allocator<N, DimDiff<D, U1>>,
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DefaultAllocator: Allocator<N, D, D> + Allocator<N, D> + Allocator<N, DimDiff<D, U1>>,
pub fn new(hess: MatrixN<N, D>) -> Self
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Computes the Hessenberg decomposition using householder reflections.
pub fn new_with_workspace(hess: MatrixN<N, D>, work: &mut VectorN<N, D>) -> Self
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Computes the Hessenberg decomposition using householder reflections.
The workspace containing D
elements must be provided but its content does not have to be
initialized.
pub fn unpack(self) -> (MatrixN<N, D>, MatrixN<N, D>) where
ShapeConstraint: DimEq<Dynamic, DimDiff<D, U1>>,
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ShapeConstraint: DimEq<Dynamic, DimDiff<D, U1>>,
Retrieves (q, h)
with q
the orthogonal matrix of this decomposition and h
the
hessenberg matrix.
pub fn unpack_h(self) -> MatrixN<N, D> where
ShapeConstraint: DimEq<Dynamic, DimDiff<D, U1>>,
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ShapeConstraint: DimEq<Dynamic, DimDiff<D, U1>>,
Retrieves the upper trapezoidal submatrix H
of this decomposition.
pub fn h(&self) -> MatrixN<N, D> where
ShapeConstraint: DimEq<Dynamic, DimDiff<D, U1>>,
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ShapeConstraint: DimEq<Dynamic, DimDiff<D, U1>>,
Retrieves the upper trapezoidal submatrix H
of this decomposition.
This is less efficient than .unpack_h()
as it allocates a new matrix.
pub fn q(&self) -> MatrixN<N, D>
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Computes the orthogonal matrix Q
of this decomposition.
Trait Implementations
impl<N: Clone + Real, D: Clone + DimSub<U1>> Clone for Hessenberg<N, D> where
DefaultAllocator: Allocator<N, D, D> + Allocator<N, DimDiff<D, U1>>,
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DefaultAllocator: Allocator<N, D, D> + Allocator<N, DimDiff<D, U1>>,
fn clone(&self) -> Hessenberg<N, D>
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Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
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Performs copy-assignment from source
. Read more
impl<N: Debug + Real, D: Debug + DimSub<U1>> Debug for Hessenberg<N, D> where
DefaultAllocator: Allocator<N, D, D> + Allocator<N, DimDiff<D, U1>>,
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DefaultAllocator: Allocator<N, D, D> + Allocator<N, DimDiff<D, U1>>,
fn fmt(&self, __arg_0: &mut Formatter) -> Result
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Formats the value using the given formatter. Read more
impl<N: Real, D: DimSub<U1>> Copy for Hessenberg<N, D> where
DefaultAllocator: Allocator<N, D, D> + Allocator<N, DimDiff<D, U1>>,
MatrixN<N, D>: Copy,
VectorN<N, DimDiff<D, U1>>: Copy,
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DefaultAllocator: Allocator<N, D, D> + Allocator<N, DimDiff<D, U1>>,
MatrixN<N, D>: Copy,
VectorN<N, DimDiff<D, U1>>: Copy,