Package org.ejml.dense.row.decomposition.lu

Class LUDecompositionAlt_DDRM

java.lang.Object

org.ejml.dense.row.decomposition.lu.LUDecompositionBase_DDRM

org.ejml.dense.row.decomposition.lu.LUDecompositionAlt_DDRM

All Implemented Interfaces:

DecompositionInterface<DMatrixRMaj>, LUDecomposition<DMatrixRMaj>, LUDecomposition_F64<DMatrixRMaj>

public class LUDecompositionAlt_DDRM
extends LUDecompositionBase_DDRM

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.

Field Summary

Fields inherited from class org.ejml.dense.row.decomposition.lu.LUDecompositionBase_DDRM

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

Constructor Summary

Constructors

Constructor	Description
LUDecompositionAlt_DDRM()

Method Summary

Modifier and Type	Method	Description
boolean	decompose(DMatrixRMaj a)	This is a modified version of what was found in the JAMA package.

Methods inherited from class org.ejml.dense.row.decomposition.lu.LUDecompositionBase_DDRM

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

Methods inherited from class java.lang.Object

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

Constructor Details

LUDecompositionAlt_DDRM

public LUDecompositionAlt_DDRM()

Method Details

decompose

public boolean decompose(DMatrixRMaj 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.