org.ejml.alg.dense.decomposition.lu
Class LUDecompositionAlt

java.lang.Object
  org.ejml.alg.dense.decomposition.lu.LUDecompositionBase
      org.ejml.alg.dense.decomposition.lu.LUDecompositionAlt

All Implemented Interfaces:

DecompositionInterface<DenseMatrix64F>, LUDecomposition<DenseMatrix64F>

public class LUDecompositionAlt
extends LUDecompositionBase

An LU decomposition algorithm that originally came from Jama. In general this is faster than what is in NR since it creates a cache of a column, which makes a big difference in larger matrices.

Author:

Peter Abeles

Field Summary

Fields inherited from class org.ejml.alg.dense.decomposition.lu.LUDecompositionBase

dataLU, indx, LU, m, maxWidth, n, pivot, pivsign, vv

Constructor Summary

LUDecompositionAlt()

Method Summary

boolean

decompose(DenseMatrix64F a) This is a modified version of what was found in the JAMA package.

Methods inherited from class org.ejml.alg.dense.decomposition.lu.LUDecompositionBase

_getVV, _solveVectorInternal, computeDeterminant, decomposeCommonInit, getIndx, getLower, getLU, getPivot, getPivot, getUpper, inputModified, isSingular, quality, setExpectedMaxSize

Methods inherited from class java.lang.Object

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

Constructor Detail

LUDecompositionAlt

public LUDecompositionAlt()

Method Detail

decompose

public boolean decompose(DenseMatrix64F a)

This is a modified version of what was found in the JAMA package. The order that it performs its permutations in is the primary difference from NR

Parameters:

a - The matrix that is to be decomposed. Not modified.

Returns:

true If the matrix can be decomposed and false if it can not.