ch.akuhn.matrix.eigenvalues

Class Eigenvalues

java.lang.Object

ch.akuhn.matrix.eigenvalues.Eigenvalues

Direct Known Subclasses:

AllEigenvalues, FewEigenvalues

public class Eigenvalues
extends Object

The eigen-decomposition of a matrix.

Author:

Adrian Kuhn

Field Summary

Fields

Modifier and Type	Field and Description
protected int	n
protected int	nev
double[]	value The eigenvalues
Vector[]	vector The eigenvectors

Constructor Summary

Constructors

Constructor and Description
Eigenvalues(int n) Construct with the given dimensions

Method Summary

Modifier and Type	Method and Description
int	getN()
Eigenvalues	largest(int nev) Configure to compute the largest nev values/vectors.
static Eigenvalues	of(Matrix A) Get an object that can compute the eigendecomposition of the given matrix.
Eigenvalues	run() Run the decomposition algorithm.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

value

public double[] value

The eigenvalues

vector

public Vector[] vector

The eigenvectors

n

protected int n

nev

protected int nev

Constructor Detail

Eigenvalues

public Eigenvalues(int n)

Construct with the given dimensions

Parameters:

n -

Method Detail

of

public static Eigenvalues of(Matrix A)

Get an object that can compute the eigendecomposition of the given matrix. If the matrix has fewer than 10 columns, this will be an AllEigenvalues, otherwise it will be a FewEigenvalues.

Parameters:

A -

Returns:

the object to compute the eigen decomposition

largest

public Eigenvalues largest(int nev)

Configure to compute the largest nev values/vectors.

Parameters:

nev -

Returns:

this

run

public Eigenvalues run()

Run the decomposition algorithm. Subclasses should override as necessary.

Returns:

this

getN

public int getN()

Returns:

the total number of possible eigen vectors (i.e. the number of rows of the input)