LUPDecomposition

java.lang.Object

org.opensourcephysics.numerics.LUPDecomposition

public class LUPDecomposition extends Object

Lower Upper Permutation (LUP) decomposition See Object Oriented Implementation of Numerical Methods by Didier H. Besset.

Author:: Didier H. Besset

Constructor Summary

Constructors

Constructor

Description

LUPDecomposition(double[][] components)

Constructor method
Method Summary

Modifier and Type

Method

Description

double

determinant()

Gets the determinant.

double[][]

inverseMatrixComponents()

Calculates the inverse matrix components.

double[]

solve(double[] c)

static void

symmetrizeComponents(double[][] components)

Make sure the supplied matrix components are those of a symmetric matrix

String

toString()

Returns a String that represents the value of this object.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Details
- LUPDecomposition
  
  public LUPDecomposition(double[][] components) throws IllegalArgumentException
  
  Constructor method
  
  Parameters:
  
  components - double[][]
  
  Throws:
  
  IllegalArgumentException
Method Details
- determinant
  
  public double determinant()
  
  Gets the determinant.
  
  Returns:
  
  double[]
- inverseMatrixComponents
  
  public double[][] inverseMatrixComponents()
  
  Calculates the inverse matrix components.
  
  Returns:
  
  the matrix inverse or null if the inverse does not exist
- symmetrizeComponents
  
  public static void symmetrizeComponents(double[][] components)
  
  Make sure the supplied matrix components are those of a symmetric matrix
  
  Parameters:
  
  components - double
- solve
  
  public double[] solve(double[] c)
  
  Parameters:
  
  c - double[]
  
  Returns:
  
  double[]
- toString
  
  public String toString()
  
  Returns a String that represents the value of this object.
  
  Overrides:
  
  toString in class Object
  
  Returns:
  
  a string representation of the receiver