Package org.apache.commons.math.random

Examples of org.apache.commons.math.random.RandomDataImpl


    public NaturalRanking(NaNStrategy nanStrategy,
            RandomGenerator randomGenerator) {
        super();
        this.nanStrategy = nanStrategy;
        this.tiesStrategy = TiesStrategy.RANDOM;
        randomData = new RandomDataImpl(randomGenerator);
    }
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    return (T) pickArray(args);
  }

  public static Number pickRange(NumberRange range) {
    Number result = null;
    RandomData randomData = new RandomDataImpl();

    if (range.getMinimumNumber() instanceof Integer && range.getMaximumNumber() instanceof Integer) {
      result = randomData.nextInt(range.getMinimumInteger(), range.getMaximumInteger());
    }

    if (range.getMinimumNumber() instanceof Long && range.getMaximumNumber() instanceof Long) {
      result = randomData.nextLong(range.getMinimumLong(), range.getMaximumLong());
    }

    if (range.getMinimumNumber() instanceof Float && range.getMaximumNumber() instanceof Float) {
      result = randomData.nextUniform(range.getMinimumFloat(), range.getMaximumFloat());
    }

    if (range.getMinimumNumber() instanceof Double && range.getMaximumNumber() instanceof Double) {
      result = randomData.nextUniform(range.getMinimumDouble(), range.getMaximumDouble());
    }

    return result;
  }
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    return null;
  }
 
  public static double getRandom(double mean, double stdDev)
  {
    RandomDataImpl randomDataImpl = new RandomDataImpl();
    randomDataImpl.reSeedSecure(1000);
    return randomDataImpl.nextGaussian(mean, stdDev);
  }
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    public void testWithInitialCapacity() {
       
        ResizableDoubleArray eDA2 = new ResizableDoubleArray(2);
        assertEquals("Initial number of elements should be 0", 0, eDA2.getNumElements());
       
        RandomData randomData = new RandomDataImpl();
        int iterations = randomData.nextInt(100, 1000);
       
        for( int i = 0; i < iterations; i++) {
            eDA2.addElement( i );
        }
       
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    public void testWithInitialCapacityAndExpansionFactor() {
       
        ResizableDoubleArray eDA3 = new ResizableDoubleArray(3, 3.0f, 3.5f);
        assertEquals("Initial number of elements should be 0", 0, eDA3.getNumElements() );
       
        RandomData randomData = new RandomDataImpl();
        int iterations = randomData.nextInt(100, 3000);
       
        for( int i = 0; i < iterations; i++) {
            eDA3.addElement( i );
        }
       
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        double[] test1 = {5,4,3,2,1};
        double[] test2 = {5,2,1,3,4,0};
        double[] test3 = {1};
        int[] testi = null;
        double[] test4 = null;
        RandomData rd = new RandomDataImpl();
        tstGetSortedValues(test1);
        tstGetSortedValues(test2);
        tstGetSortedValues(test3);
        for (int i = 0; i < 10; i++) {
            testi = rd.nextPermutation(10,6);
            test4 = new double[6];
            for (int j = 0; j < testi.length; j++) {
                test4[j] = (double) testi[j];
            }
            tstGetSortedValues(test4);
        }
        for (int i = 0; i < 10; i++) {
            testi = rd.nextPermutation(10,5);
            test4 = new double[5];
            for (int j = 0; j < testi.length; j++) {
                test4[j] = (double) testi[j];
            }
            tstGetSortedValues(test4);
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        assertEquals("Q1",1,u.getPercentile(25),10E-12);
        assertEquals("Q3",1,u.getPercentile(75),10E-12);
        assertEquals("Q2",1,u.getPercentile(50),10E-12);
       
        u.clear();
        RandomData rd = new RandomDataImpl();
        int[] testi = rd.nextPermutation(100,100); // will contain 0-99
        for (int j = 0; j < testi.length; j++) {
            u.addValue((double) testi[j])//OK, laugh at me for the cast
        }
        for (int i = 1; i < 100; i++) {
            assertEquals("percentile " + i,
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        double[] test1 = {5,4,3,2,1};
        double[] test2 = {5,2,1,3,4,0};
        double[] test3 = {1};
        int[] testi = null;
        double[] test4 = null;
        RandomData rd = new RandomDataImpl();
        tstGetSortedValues(test1);
        tstGetSortedValues(test2);
        tstGetSortedValues(test3);
        for (int i = 0; i < 10; i++) {
            testi = rd.nextPermutation(10,6);
            test4 = new double[6];
            for (int j = 0; j < testi.length; j++) {
                test4[j] = (double) testi[j];
            }
            tstGetSortedValues(test4);
        }
        for (int i = 0; i < 10; i++) {
            testi = rd.nextPermutation(10,5);
            test4 = new double[5];
            for (int j = 0; j < testi.length; j++) {
                test4[j] = (double) testi[j];
            }
            tstGetSortedValues(test4);
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        assertEquals("Q1",1,u.getPercentile(25),10E-12);
        assertEquals("Q3",1,u.getPercentile(75),10E-12);
        assertEquals("Q2",1,u.getPercentile(50),10E-12);
       
        u.clear();
        RandomData rd = new RandomDataImpl();
        int[] testi = rd.nextPermutation(100,100); // will contain 0-99
        for (int j = 0; j < testi.length; j++) {
            u.addValue((double) testi[j])//OK, laugh at me for the cast
        }
        for (int i = 1; i < 100; i++) {
            assertEquals("percentile " + i,
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        int[] primeList = {19, 23, 53, 67, 73, 79, 101, 103, 111, 131};
        ArrayList<Integer> primes = new ArrayList<Integer>();
        for (int i = 0; i < primeList.length; i++) {
            primes.add(Integer.valueOf(primeList[i]));
        }
        RandomDataImpl randomData = new RandomDataImpl();
        for (int i = 0; i < 20; i++) {
            Object[] sample = randomData.nextSample(primes, 4);
            int p1 = ((Integer) sample[0]).intValue();
            int p2 = ((Integer) sample[1]).intValue();
            int p3 = ((Integer) sample[2]).intValue();
            int p4 = ((Integer) sample[3]).intValue();
            int i1 = p1 * p2 * p3;
 
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