no.uib.cipr.matrix
Class QL

java.lang.Object
  no.uib.cipr.matrix.QL

public class QL
extends java.lang.Object

Computes QL decompositions

Constructor Summary

QL(int m, int n)
Constructs an empty QL decomposition

Method Summary

QL	factor(DenseMatrix A) Computes an orthogonal decomposition
static QL	factorize(Matrix A) Convenience method to compute a QL decomposition
LowerTriangDenseMatrix	getL() Returns the lower triangular factor
DenseMatrix	getQ() Returns the orthogonal part of the factorization

Methods inherited from class java.lang.Object

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

Constructor Detail

QL

public QL(int m,
          int n)

Constructs an empty QL decomposition

Parameters:

m - Number of rows. Must be larger than or equal the number of columns

n - Number of columns

Method Detail

factorize

public static QL factorize(Matrix A)

Convenience method to compute a QL decomposition

Parameters:

A - Matrix to decompose. Not modified

Returns:

Newly allocated decomposition

factor

public QL factor(DenseMatrix A)

Computes an orthogonal decomposition

Parameters:

A - Matrix to decompose. Overwritten on exit. Pass a copy to avoid this

Returns:

The current decomposition

getL

public LowerTriangDenseMatrix getL()

Returns the lower triangular factor

getQ

public DenseMatrix getQ()

Returns the orthogonal part of the factorization