org.jutil.math.matrix
Class QRLeastSquaresSolver

java.lang.Object
  |
  +--org.jutil.math.matrix.AbstractSolver
        |
        +--org.jutil.math.matrix.QRLeastSquaresSolver

All Implemented Interfaces:

LeastSquaresSolver

public class QRLeastSquaresSolver

extends AbstractSolver

implements LeastSquaresSolver

A class of objects that solve least squares problems using its QR decomposition.

Field Summary
static java.lang.String	CVS_REVISION

 

Constructor Summary

QRLeastSquaresSolver(QRDecomposer decomposer)           Initialize a new QRLeastSquaresSolver with the given QRDecomposer.

 

Method Summary
QRDecomposer	getDecomposer()           Return the QRDecomposer of this QRLeastSquaresSolver.
Column	solve(Matrix A, Column b)           see superclass

 

Methods inherited from class org.jutil.math.matrix.AbstractSolver

backSubstitute, forwardSubstitute

 

Methods inherited from class java.lang.Object

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

 

Field Detail

CVS_REVISION

public static final java.lang.String CVS_REVISION

QRLeastSquaresSolver

public QRLeastSquaresSolver(QRDecomposer decomposer)

Initialize a new QRLeastSquaresSolver with the given QRDecomposer.

Parameters:

decomposer - The QRDecomposer to be used by this QRLeastSquaresSolver.

Specifications:

public behavior
requires decomposer != null;
ensures getDecomposer() == decomposer;

getDecomposer

public QRDecomposer getDecomposer()

Return the QRDecomposer of this QRLeastSquaresSolver.

solve

public Column solve(Matrix A,
                    Column b)

see superclass

Specifications inherited from overridden method in interface LeastSquaresSolver:

public behavior
requires A != null;
requires b != null;
requires b.size() == A.getNbRows();
ensures (* (\forall Column col; col.size() == b.size(); b.minus(A.times(\result)).norm(2) <= b.minus(A.times(col)).norm(2)) *);