Example usage for org.apache.commons.math3.random RandomGenerator RandomGenerator

Introduction

In this page you can find the example usage for org.apache.commons.math3.random RandomGenerator RandomGenerator.

Prototype

RandomGenerator

Source Link

Usage

From source file:io.coala.math3.Math3PseudoRandom.java

/**
 * @param rng the {@link PseudoRandom} to unwrap (if possible)
 * @return the unwrapped {@link RandomGenerator} or otherwise a decorated
 *         {@link PseudoRandom}// w  ww.j a v a 2s  .c  o  m
 */
public static RandomGenerator toRandomGenerator(final PseudoRandom rng) {
    return rng instanceof Math3PseudoRandom ? ((Math3PseudoRandom) rng).unwrap() : new RandomGenerator() {
        @Override
        public void setSeed(final int seed) {
            throw ExceptionFactory.createUnchecked("Seed can be set only once");
        }

        @Override
        public void setSeed(final int[] seed) {
            throw ExceptionFactory.createUnchecked("Seed can be set only once");
        }

        @Override
        public void setSeed(final long seed) {
            throw ExceptionFactory.createUnchecked("Seed can be set only once");
        }

        @Override
        public void nextBytes(final byte[] bytes) {
            rng.nextBytes(bytes);
        }

        @Override
        public int nextInt() {
            return rng.nextInt();
        }

        @Override
        public int nextInt(int n) {
            return rng.nextInt(n);
        }

        @Override
        public long nextLong() {
            return rng.nextInt();
        }

        @Override
        public boolean nextBoolean() {
            return rng.nextBoolean();
        }

        @Override
        public float nextFloat() {
            return rng.nextFloat();
        }

        @Override
        public double nextDouble() {
            return rng.nextDouble();
        }

        @Override
        public double nextGaussian() {
            return rng.nextGaussian();
        }
    };
}

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From source file:edu.byu.nlp.crowdsourcing.ModelInitializationTest.java

@Test
public void testNoisyInitializer() {

    // a dummy rand number generator
    RandomGenerator rnd = new RandomGenerator() {
        private int i = 0;
        private int j = 0;

        @Override/*from w w  w .java 2 s .  c o  m*/
        public int nextInt(int arg0) {
            return new int[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 }[i++];
        }

        @Override
        public double nextDouble() {
            return new double[] { .1, .9, .1, .9, .1, .9, .1, .9, .1, .9 }[j++];
        }

        @Override
        public void setSeed(long arg0) {
        }

        @Override
        public void setSeed(int[] arg0) {
        }

        @Override
        public void setSeed(int arg0) {
        }

        @Override
        public long nextLong() {
            throw new UnsupportedOperationException();
        }

        @Override
        public int nextInt() {
            throw new UnsupportedOperationException();
        }

        @Override
        public double nextGaussian() {
            throw new UnsupportedOperationException();
        }

        @Override
        public float nextFloat() {
            throw new UnsupportedOperationException();
        }

        @Override
        public void nextBytes(byte[] arg0) {
            throw new UnsupportedOperationException();
        }

        @Override
        public boolean nextBoolean() {
            throw new UnsupportedOperationException();
        }
    };

    // a do-nothing delegate
    AssignmentInitializer delegate = new AssignmentInitializer() {
        @Override
        public void setData(Dataset data, Map<String, Integer> instanceIndices) {
        }

        @Override
        public void initialize(int[] assignments) {
        }
    };

    int[] arr = new int[] { 9, 9, 9, 9, 9, 9, 9, 9, 9, 9 };
    NoisyInitializer noisyInit = new ModelInitialization.NoisyInitializer(delegate, 0.8, 4, rnd);
    noisyInit.initialize(arr);
    Assertions.assertThat(arr).isEqualTo(new int[] { 0, 9, 1, 9, 2, 9, 3, 9, 4, 9 });
}

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From source file:com.github.rinde.rinsim.geom.GraphsTest.java

@Test
public void getRandomNodeImpossible() {

    Point A, B, C, D;/* ww w .j  a va  2  s .  com*/
    A = new Point(0, 0);
    B = new Point(0, 10);
    C = new Point(10, 10);
    D = new Point(10, 0);
    Graphs.addBiPath(graph, A, B, C, D, A);

    final RandomGenerator rg = new RandomGenerator() {

        @Override
        public void setSeed(long arg0) {

        }

        @Override
        public void setSeed(@Nullable int[] arg0) {

        }

        @Override
        public void setSeed(int arg0) {

        }

        @Override
        public long nextLong() {
            return 0;
        }

        @Override
        public int nextInt(int arg0) {
            return arg0 + 1;
        }

        @Override
        public int nextInt() {
            return 0;
        }

        @Override
        public double nextGaussian() {
            return 0;
        }

        @Override
        public float nextFloat() {
            return 0;
        }

        @Override
        public double nextDouble() {
            return 0;
        }

        @Override
        public void nextBytes(@Nullable byte[] arg0) {
        }

        @Override
        public boolean nextBoolean() {
            return false;
        }
    };
    boolean flag = false;
    try {
        graph.getRandomNode(rg);
    } catch (final IllegalStateException e) {
        flag = true;
    }
    assertTrue(flag);
}

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From source file:org.compevol.ssgd.MaximumLikelihood.java

public MaximumLikelihood(final MultivariateFunction likelihood, final Parameter variables) {
    this.likelihood = likelihood;
    this.variables = variables;
    initial = new double[variables.getDimension()];
    Arrays.fill(initial, 1);/*from w  ww  .j  ava 2 s.c om*/
    optimizer = new CMAESOptimizer(Integer.MAX_VALUE, 0.0, true, 0, 8096, new RandomGenerator() {

        @Override
        public void setSeed(int i) {
            throw new UnsupportedOperationException();
        }

        @Override
        public void setSeed(int[] ints) {
            throw new UnsupportedOperationException();
        }

        @Override
        public void setSeed(long l) {
            throw new UnsupportedOperationException();
        }

        @Override
        public void nextBytes(byte[] bytes) {
            MathUtils.nextBytes(bytes);
        }

        @Override
        public int nextInt() {
            return MathUtils.nextInt();
        }

        @Override
        public int nextInt(int i) {
            return MathUtils.nextInt(i);
        }

        @Override
        public long nextLong() {
            return MathUtils.nextLong();
        }

        @Override
        public boolean nextBoolean() {
            return MathUtils.nextBoolean();
        }

        @Override
        public float nextFloat() {
            return MathUtils.nextFloat();
        }

        @Override
        public double nextDouble() {
            return MathUtils.nextDouble();
        }

        @Override
        public double nextGaussian() {
            return MathUtils.nextGaussian();
        }
    }, true, new SimplePointChecker<PointValuePair>(MachineAccuracy.SQRT_EPSILON, MachineAccuracy.EPSILON));
}

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