Package org.apache.commons.math3.random

Examples of org.apache.commons.math3.random.RandomGenerator

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        final BivariateFunction bcf
            = new BicubicSplineInterpolatingFunction(xval, yval, zval,
                                                     dZdX, dZdY, dZdXdY);
        double x, y;

        final RandomGenerator rng = new Well19937c(1234567L); // "tol" depends on the seed.
        final UniformRealDistribution distX
            = new UniformRealDistribution(rng, xval[0], xval[xval.length - 1]);
        final UniformRealDistribution distY
            = new UniformRealDistribution(rng, yval[0], yval[yval.length - 1]);
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        BivariateFunction bcf = new BicubicSplineInterpolatingFunction(xval, yval, zval,
                                                                       dZdX, dZdY, dZdXdY);
        double x, y;

        final RandomGenerator rng = new Well19937c(1234567L); // "tol" depends on the seed.
        final UniformRealDistribution distX
            = new UniformRealDistribution(rng, xval[0], xval[xval.length - 1]);
        final UniformRealDistribution distY
            = new UniformRealDistribution(rng, yval[0], yval[yval.length - 1]);
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        BivariateGridInterpolator interpolator = new PiecewiseBicubicSplineInterpolator();
        BivariateFunction p = interpolator.interpolate(xval, yval, zval);
        double x, y;

        final RandomGenerator rng = new Well19937c(1234567L); // "tol" depends on the seed.
        final UniformRealDistribution distX = new UniformRealDistribution( rng, xval[0], xval[xval.length - 1] );
        final UniformRealDistribution distY = new UniformRealDistribution( rng, yval[0], yval[yval.length - 1] );

        final int numSamples = 50;
        final double tol = 2e-14;
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        BivariateGridInterpolator interpolator = new PiecewiseBicubicSplineInterpolator();
        BivariateFunction p = interpolator.interpolate(xval, yval, zval);
        double x, y;

        final RandomGenerator rng = new Well19937c(1234567L); // "tol" depends on the seed.
        final UniformRealDistribution distX = new UniformRealDistribution( rng, xval[0], xval[xval.length - 1] );
        final UniformRealDistribution distY = new UniformRealDistribution( rng, yval[0], yval[yval.length - 1] );

        final int numSamples = 50;
        final double tol = 5e-13;
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            expected = f.value( currentX );
            actual = interpolation.value( currentX );
            assertTrue( Precision.equals( expected, actual ) );
        }

        final RandomGenerator rng = new Well19937c( 1234567L ); // "tol" depends on the seed.
        final UniformRealDistribution distX =
            new UniformRealDistribution( rng, xValues[0], xValues[xValues.length - 1] );

        double sumError = 0;
        for ( int i = 0; i < numberOfSamples; i++ )
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                                      double y,
                                      double radius,
                                      double xSigma,
                                      double ySigma,
                                      long seed) {
        final RandomGenerator rng = new Well44497b(seed);
        this.radius = radius;
        cX = new NormalDistribution(rng, x, xSigma,
                                    NormalDistribution.DEFAULT_INVERSE_ABSOLUTE_ACCURACY);
        cY = new NormalDistribution(rng, y, ySigma,
                                    NormalDistribution.DEFAULT_INVERSE_ABSOLUTE_ACCURACY);
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        }
    }

    @Test
    public void testFloorDivModInt() {
        RandomGenerator generator = new Well1024a(0x7ccab45edeaab90al);
        for (int i = 0; i < 10000; ++i) {
            int a = generator.nextInt();
            int b = generator.nextInt();
            if (b == 0) {
                try {
                    FastMath.floorDiv(a, b);
                    Assert.fail("an exception should have been thrown");
                } catch (MathArithmeticException mae) {
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        }
    }

    @Test
    public void testFloorDivModLong() {
        RandomGenerator generator = new Well1024a(0xb87b9bc14c96ccd5l);
        for (int i = 0; i < 10000; ++i) {
            long a = generator.nextLong();
            long b = generator.nextLong();
            if (b == 0) {
                try {
                    FastMath.floorDiv(a, b);
                    Assert.fail("an exception should have been thrown");
                } catch (MathArithmeticException mae) {
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    static final int[] sampleSizes= {TINY , SMALL , NOMINAL , MEDIUM ,
            STANDARD, BIG };

    @Test
    public void testStoredVsDirect() {
        final RandomGenerator rand= new JDKRandomGenerator();
        rand.setSeed(Long.MAX_VALUE);
        for (final int sampleSize:sampleSizes) {
            final double[] data = new NormalDistribution(rand,4000, 50)
                                .sample(sampleSize);
            for (final double p:new double[] {50d,95d}) {
                for (final Percentile.EstimationType e : Percentile.EstimationType.values()) {
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        TestUtils.assertEquals(correctRanks, ranks, 0d);
    }

    @Test
    public void testNaNsFixedTiesRandom() {
        RandomGenerator randomGenerator = new JDKRandomGenerator();
        randomGenerator.setSeed(1000);
        NaturalRanking ranking = new NaturalRanking(NaNStrategy.FIXED,
                randomGenerator);
        double[] ranks = ranking.rank(exampleData);
        double[] correctRanks = { 5, 3, 6, 7, 3, 8, Double.NaN, 1, 2 };
        TestUtils.assertEquals(correctRanks, ranks, 0d);
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Related Classes of org.apache.commons.math3.random.RandomGenerator

  • net.myrrix.online.factorizer.als.AlternatingLeastSquares
  • net.myrrix.online.som.SelfOrganizingMaps
  • org.apache.commons.math3.analysis.differentiation.DerivativeStructure
  • org.apache.commons.math3.analysis.differentiation.MultivariateDifferentiableVectorFunction
  • org.apache.commons.math3.analysis.function.HarmonicOscillator
  • org.apache.commons.math3.analysis.function.LogitTest
  • org.apache.commons.math3.analysis.function.Sin
  • org.apache.commons.math3.analysis.function.Sinc
  • org.apache.commons.math3.analysis.interpolation.BicubicSplineInterpolatingFunctionTest
  • org.apache.commons.math3.analysis.interpolation.BicubicSplineInterpolatorTest
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