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JSci is a set of open source Java packages. The aim is to encapsulate scientific methods/principles in the most natural way possible. As such they should greatly aid the development of scientific based software. It offers: abstract math interfaces, linear algebra (support for various matrix and vector types), statistics (including probability distributions), wavelets, newtonian mechanics, chart/graph components (AWT and Swing), MathML DOM implementation, ... Note: some packages, like javax.comm, for the astro and instruments package aren't listed as dependencies (not available).

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package JSci.tests;

import java.lang.reflect.Constructor;
import java.util.*;
import junit.framework.*;
import JSci.maths.*;
import JSci.maths.matrices.*;
import JSci.util.MatrixToolkit;

/**
* Testcase for matrix decomposition methods.
* @author Mark Hale
*/
public class MatrixDecompositionTest extends TestCase {
        private final int N=5;
        private Constructor dConstructor, zConstructor;
        private double dArray[][];
        private Complex zArray[][];

        public static void main(String arg[]) {
                junit.textui.TestRunner.run(suite());
        }
        public static Test suite() {
                Class[] dClasses = new Class[] {
                        DoubleSquareMatrix.class, DoubleTridiagonalMatrix.class,
                        DoubleDiagonalMatrix.class, DoubleSparseSquareMatrix.class
                };
                Class[] zClasses = new Class[] {
                        ComplexSquareMatrix.class, ComplexTridiagonalMatrix.class,
                        ComplexDiagonalMatrix.class, ComplexSquareMatrix.class // dummy
                };
                TestSuite suite = new TestSuite(MatrixDecompositionTest.class.toString());
                for(int i=0; i=i-1 && j<=i+1) {
                                        dArray[i][j]=ExtraMath.random(-1.0, 1.0);
                                }
                        }
                }
        }
        private void setUpDoubleDiagonal() {
                for(int i=0;i=i-1 && j<=i+1) {
                                        zArray[i][j]=new Complex(dArray[i][j], ExtraMath.random(-1.0, 1.0));
                                }
                        }
                }
        }
        private void setUpComplexDiagonal() {
                for(int i=0;i