Example usage for org.apache.commons.lang.math RandomUtils nextDouble

Introduction

In this page you can find the example usage for org.apache.commons.lang.math RandomUtils nextDouble.

Prototype

public static double nextDouble() 

Source Link

Document

Returns the next pseudorandom, uniformly distributed float value between 0.0 and 1.0 from the Math.random() sequence.

Usage

From source file:MainClass.java

public static void main(String[] args) {
    //Random Value Generation
    System.out.println("Random double >>> " + RandomUtils.nextDouble());
    System.out.println("Random float >>> " + RandomUtils.nextFloat());
    System.out.println("Random int >>> " + RandomUtils.nextInt());
}

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From source file:MathUtilsTrial.java

public static void main(String[] args) {

    // Random Value Generation
    System.out.println("Random double >>> " + RandomUtils.nextDouble());
    System.out.println("Random float >>> " + RandomUtils.nextFloat());
    System.out.println("Random int >>> " + RandomUtils.nextInt());

}

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From source file:com.github.pmerienne.cf.recommendation.TopKItemsTest.java

@Test
public void should_not_exceed_max_size() {
    // Given/*from  w  w w  . jav a  2  s.c o m*/
    int maxSize = 10;
    TopKItems topKItems = new TopKItems(maxSize);
    for (int i = 0; i < maxSize * 2; i++) {
        topKItems.add(new Recommendation(RandomUtils.nextLong(), RandomUtils.nextDouble()));
    }

    // When
    topKItems.ensureSize();

    // Then
    assertThat(topKItems.size()).isLessThanOrEqualTo(maxSize);
}

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From source file:com.vmware.bdd.manager.job.ProvisionTasklet.java

private void randomlyFail(double p) throws Exception {
    if (RandomUtils.nextDouble() > 1 - p) {
        throw BddException.INTERNAL(new Exception(), "Undefined random failure.");
    }/*from   w  w  w.j  a v  a 2s  .  c o m*/
}

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From source file:com.github.pmerienne.cf.recommendation.TopKItemsTest.java

@Test
public void should_sort_recommendations() {
    // Given//from ww w  .j  a va2 s .c  o  m
    int maxSize = 10;

    // When
    TopKItems topKItems = new TopKItems(maxSize);
    for (int i = 0; i < maxSize; i++) {
        topKItems.add(new Recommendation(RandomUtils.nextLong(), RandomUtils.nextDouble()));
    }

    // Then
    double previousScore = Double.MAX_VALUE;
    for (Recommendation recommendation : topKItems) {
        assertThat(recommendation.getScore()).isLessThan(previousScore);
        previousScore = recommendation.getScore();
    }
}

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From source file:com.mycompany.sonarqube.scanner.RandomMeasureComputer.java

@Override
public void compute(MeasureComputerContext context) {
    // This method is executed on the whole tree of components.
    // Bottom-up traversal : files -> directories -> modules -> project

    double value;
    if (context.getComponent().getType() == Component.Type.FILE) {
        // set a random value on files
        value = RandomUtils.nextDouble();
    } else {//from www .j  a va  2s.  c  om
        // directory, module or project: sum values of children
        value = 0.0;
        for (Measure childMeasure : context.getChildrenMeasures(ExampleMetrics.RANDOM.getKey())) {
            value += childMeasure.getDoubleValue();
        }
    }
    context.addMeasure(ExampleMetrics.RANDOM.getKey(), value);
}

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From source file:com.github.pmerienne.cf.testing.dataset.DatasetUtils.java

public static List<Rating> generateSparseRatings(double sparsity, long userOffset, long itemOffset,
        long userCount, long itemCount, boolean asc) {
    List<Rating> allRatings = new ArrayList<>();

    for (long i = userOffset; i < userCount + userOffset; i++) {
        for (long j = itemOffset; j < itemOffset + itemCount; j++) {
            if (RandomUtils.nextDouble() > sparsity) {
                double value = asc ? (double) j / (double) itemCount + itemOffset
                        : 1 - (double) j / ((double) itemCount + (double) itemOffset);
                allRatings.add(new Rating(i, j, value));
            }/*from w w w  .  java 2  s. c om*/
        }
    }

    Collections.shuffle(allRatings);
    return allRatings;
}

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From source file:net.librec.recommender.item.RecommendedItemListTestCase.java

@Test
public void test() {
    testSparseMatrixAndRecommender();//from www  . j ava 2  s.c  om

    //System.exit(0);
    //      RecommendedItemList x = new RecommendedItemList();
    //      ArrayList x = new ArrayList<>();
    long time = System.currentTimeMillis();
    DenseMatrix x = new DenseMatrix(10000, 10000);
    //      double[][] data = new double[10000][10000];
    //      System.out.println(time);
    int k = 0;
    for (int i = 0; i < 10000; i++) {
        //         ArrayList<ItemEntry<Integer, Double>> y = new ArrayList<>();
        for (int j = 0; j < 10000; j++) {
            //            ItemEntry<Integer, Double> itemEntry = new ItemEntry<Integer, Double>(j, RandomUtils.nextDouble());
            if (k % 10000 == 0) {
                System.out.println(k);
            }
            x.set(i, j, RandomUtils.nextDouble());
            //            recommendedItemList.addUserItemIdx(i,j,RandomUtils.nextDouble());
            k++;
        }
        //         x.addItemIdxList(i, y);
    }
    System.out.println(System.currentTimeMillis() - time);
}

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From source file:at.uni_salzburg.cs.ros.artificer.LocationData.java

/**
 * @param configuration configuration//from w ww  .  j  a  v  a  2s  . c  om
 * @param location location
 */
public LocationData(Configuration configuration, Location location) {
    clock = configuration.getClock();
    this.location = location;
    simDetails = configuration.getLocationSimulationDetails();
    velocity = simDetails.get(location.getLocationId()).getAverageSpeed();
    mutation = simDetails.get(location.getLocationId()).getMutationSpeed();

    minLatitude = simDetails.get(location.getLocationId()).getMinLatitude();
    maxLatitude = simDetails.get(location.getLocationId()).getMaxLatitude();
    minLongitude = simDetails.get(location.getLocationId()).getMinLongitude();
    maxLongitude = simDetails.get(location.getLocationId()).getMaxLongitude();

    moving = Math.abs(velocity) > 1E-6 || Math.abs(mutation) > 1E-4;
    heading = RandomUtils.nextDouble() * 2.0 * Math.PI;
    headingSouth = Math.sin(heading) * velocity;
    headingEast = Math.cos(heading) * velocity;
}

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From source file:com.github.pmerienne.trident.state.testing.TestValue.java

public static TestValue random() {
    TestValue testValue = new TestValue(RandomUtils.nextDouble(), UUID.randomUUID().toString(),
            new ArrayList<Integer>(), new NestedObject());
    for (int i = 0; i < 7; i++) {
        testValue.getTestIntegerList().add(new Random().nextInt());
    }/*from  ww  w.  j a  v  a  2  s .  co  m*/
    return testValue;
}

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