Package rocks.palaiologos.maja.matrix

Class DoubleQRDecompositionResult

java.lang.Object

rocks.palaiologos.maja.matrix.DoubleQRDecompositionResult

public class DoubleQRDecompositionResult
extends Object

The result of QR decomposition.

Author:

Palaiologos

Constructor Summary

Constructors

Constructor	Description
DoubleQRDecompositionResult(DoubleMatrix q, DoubleMatrix r, DoubleMatrix h, boolean fullrank, int n, int m, DoubleMatrix QR, double[] Rdiag)

Method Summary

Modifier and Type	Method	Description
boolean	fullrank()	True if the matrix is full rank.
DoubleMatrix	h()	The householder matrix; lower trapezoidal matrix whose columns define the reflections.
DoubleMatrix	q()	The Q matrix.
DoubleMatrix	r()	The R matrix.
DoubleMatrix	solve(DoubleMatrix B)	Least squares solution of A*X = B.

Methods inherited from class java.lang.Object

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

Constructor Details

DoubleQRDecompositionResult

public DoubleQRDecompositionResult(DoubleMatrix q,
 DoubleMatrix r,
 DoubleMatrix h,
 boolean fullrank,
 int n,
 int m,
 DoubleMatrix QR,
 double[] Rdiag)

Method Details

solve

public DoubleMatrix solve(DoubleMatrix B)

Least squares solution of A*X = B.

Parameters:

B -

Returns:

X that minimizes the two norm of Q*R*X-B.

Throws:

IllegalArgumentException - If matrix row dimensions don't agree or the matrix is rank deficient.

q

public DoubleMatrix q()

The Q matrix.

r

public DoubleMatrix r()

The R matrix.

h

public DoubleMatrix h()

The householder matrix; lower trapezoidal matrix whose columns define the reflections.

fullrank

public boolean fullrank()

True if the matrix is full rank.