Package org.locationtech.jts.math

Class Matrix

java.lang.Object

org.locationtech.jts.math.Matrix

public class Matrix
extends java.lang.Object

Implements some 2D matrix operations (in particular, solving systems of linear equations).

Author:

Martin Davis

Constructor Summary

Constructors

Constructor	Description
Matrix()

Method Summary

Modifier and Type	Method	Description
static double[]	solve(double[][] a, double[] b)	Solves a system of equations using Gaussian Elimination.

Methods inherited from class java.lang.Object

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

Constructor Detail

Matrix

public Matrix()

Method Detail

solve

public static double[] solve(double[][] a,
                             double[] b)

Solves a system of equations using Gaussian Elimination. In order to avoid overhead the algorithm runs in-place on A - if A should not be modified the client must supply a copy.

Parameters:

a - an nxn matrix in row/column order )modified by this method)

b - a vector of length n

Returns:

a vector containing the solution (if any) or null if the system has no or no unique solution

Throws:

java.lang.IllegalArgumentException - if the matrix is the wrong size