no.uib.cipr.matrix

Class LQ

java.lang.Object

no.uib.cipr.matrix.LQ

public class LQ
extends Object

Computes LQ decompositions

Constructor Summary

Constructors

Constructor and Description
LQ(int m, int n) Constructs an empty LQ decomposition

Method Summary

Methods

Modifier and Type	Method and Description
LQ	factor(DenseMatrix A) Computes an orthogonal decomposition
static LQ	factorize(Matrix A) Convenience method to compute a LQ 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

LQ

public LQ(int m,
  int n)

Constructs an empty LQ decomposition

Parameters:

m - Number of rows

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

Method Detail

factorize

public static LQ factorize(Matrix A)

Convenience method to compute a LQ decomposition

Parameters:

A - Matrix to decompose. Not modified

Returns:

Newly allocated decomposition

factor

public LQ 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