xlinear

Class LUDecomposition

java.lang.Object

xlinear.LUDecomposition

@Data
public class LUDecomposition
extends java.lang.Object

For a square matrix A, the LU decomposition is an unit lower triangular matrix L, an upper triangular matrix U, and a permutation vector piv so that A(piv,:) = L*U Also contains utilities for solving systems of the form M*x = b

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	LUDecomposition.LUSolver

Field Summary

Fields

Modifier and Type	Field and Description
Matrix	L Read-only triangular factors.
Matrix	U

Constructor Summary

Constructors

Constructor and Description
LUDecomposition(Matrix L, Matrix U, LUDecomposition.LUSolver solver)

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object obj)
Matrix	getL()
Matrix	getU()
int	hashCode()
double	logDet() log | determinant |
DenseMatrix	solve(Matrix b) For given b and M, find x such that M * x = b
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

L

public final Matrix L

Read-only triangular factors.

U

public final Matrix U

Constructor Detail

LUDecomposition

public LUDecomposition(Matrix L,
                       Matrix U,
                       LUDecomposition.LUSolver solver)

Method Detail

logDet

public double logDet()

log | determinant |

solve

public DenseMatrix solve(Matrix b)

For given b and M, find x such that M * x = b

hashCode

@Pure
public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

@Pure
public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

toString

@Pure
public java.lang.String toString()

Overrides:

toString in class java.lang.Object

getL

@Pure
public Matrix getL()

getU

@Pure
public Matrix getU()