org.apache.commons.math3.linear
Class RRQRDecomposition.Solver

java.lang.Object
  org.apache.commons.math3.linear.RRQRDecomposition.Solver

All Implemented Interfaces:

DecompositionSolver

Enclosing class:

RRQRDecomposition

private static class RRQRDecomposition.Solver
extends Object
implements DecompositionSolver

Specialized solver.

Field Summary

private RealMatrix	p A permutation matrix for the pivots used in the QR decomposition
private DecompositionSolver	upper Upper level solver.

Constructor Summary

private

RRQRDecomposition.Solver(DecompositionSolver upper, RealMatrix p) Build a solver from decomposed matrix.

Method Summary

RealMatrix	getInverse() Get the inverse (or pseudo-inverse) of the decomposed matrix.
boolean	isNonSingular() Check if the decomposed matrix is non-singular.
RealMatrix	solve(RealMatrix b) Solve the linear equation A × X = B for matrices A.
RealVector	solve(RealVector b) Solve the linear equation A × X = B for matrices A.

Methods inherited from class java.lang.Object

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

Field Detail

upper

private final DecompositionSolver upper

Upper level solver.

p

private RealMatrix p

A permutation matrix for the pivots used in the QR decomposition

Constructor Detail

RRQRDecomposition.Solver

private RRQRDecomposition.Solver(DecompositionSolver upper,
                                 RealMatrix p)

Build a solver from decomposed matrix.

Parameters:

upper - upper level solver.

p - permutation matrix

Method Detail

isNonSingular

public boolean isNonSingular()

Check if the decomposed matrix is non-singular.

Specified by:

isNonSingular in interface DecompositionSolver

Returns:

true if the decomposed matrix is non-singular.

solve

public RealVector solve(RealVector b)

Solve the linear equation A × X = B for matrices A.

The A matrix is implicit, it is provided by the underlying decomposition algorithm.

Specified by:

solve in interface DecompositionSolver

Parameters:

b - right-hand side of the equation A × X = B

Returns:

a vector X that minimizes the two norm of A × X - B

solve

public RealMatrix solve(RealMatrix b)

Solve the linear equation A × X = B for matrices A.

The A matrix is implicit, it is provided by the underlying decomposition algorithm.

Specified by:

solve in interface DecompositionSolver

Parameters:

b - right-hand side of the equation A × X = B

Returns:

a matrix X that minimizes the two norm of A × X - B

getInverse

public RealMatrix getInverse()

Get the inverse (or pseudo-inverse) of the decomposed matrix.

Specified by:

getInverse in interface DecompositionSolver

Returns:

inverse matrix