Example usage for java.util Random doubles

Introduction

In this page you can find the example usage for java.util Random doubles.

Prototype

public DoubleStream doubles() 

Source Link

Document

Returns an effectively unlimited stream of pseudorandom double values, each between zero (inclusive) and one (exclusive).

Usage

From source file:org.jenetics.stat.MinMaxTest.java

@Test
public void acceptNormalMinMax() {
    final Random random = RandomRegistry.getRandom();
    final double[] numbers = random.doubles().limit(1000).toArray();

    final MinMax<Double> minMax = MinMax.of();
    Arrays.stream(numbers).mapToObj(Double::new).forEach(minMax);

    Assert.assertEquals(minMax.getMin(), StatUtils.min(numbers));
    Assert.assertEquals(minMax.getMax(), StatUtils.max(numbers));
}

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From source file:org.jenetics.stat.MinMaxTest.java

@Test
public void acceptReverseMinMax() {
    final Random random = RandomRegistry.getRandom();
    final double[] numbers = random.doubles().limit(1000).toArray();

    final MinMax<Double> minMax = MinMax.of((a, b) -> b.compareTo(a));
    Arrays.stream(numbers).mapToObj(Double::new).forEach(minMax);

    Assert.assertEquals(minMax.getMin(), StatUtils.max(numbers));
    Assert.assertEquals(minMax.getMax(), StatUtils.min(numbers));
}

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From source file:org.jenetics.stat.MinMaxTest.java

@Test
public void toMinMaxNormal() {
    final Random random = RandomRegistry.getRandom();
    final double[] numbers = random.doubles().limit(1000).toArray();

    final MinMax<Double> minMax = Arrays.stream(numbers).mapToObj(Double::new).collect(MinMax.toMinMax());

    Assert.assertEquals(minMax.getMin(), StatUtils.min(numbers));
    Assert.assertEquals(minMax.getMax(), StatUtils.max(numbers));
}

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From source file:org.jenetics.stat.MinMaxTest.java

@Test
public void toMinMaxReverse() {
    final Random random = RandomRegistry.getRandom();
    final double[] numbers = random.doubles().limit(1000).toArray();

    final MinMax<Double> minMax = Arrays.stream(numbers).mapToObj(Double::new)
            .collect(MinMax.toMinMax((a, b) -> b.compareTo(a)));

    Assert.assertEquals(minMax.getMin(), StatUtils.max(numbers));
    Assert.assertEquals(minMax.getMax(), StatUtils.min(numbers));
}

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From source file:org.terracotta.statistics.derived.histogram.HistogramFittingTest.java

private double[] flatHistogramFit(long seed) {
    Random rndm = new Random(seed);

    Histogram hist = histogram(bias, bars, rndm.doubles().map(d -> d * 1000.0).limit(100000));
    return fit(hist, PolynomialCurveFitter.create(1));
}

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