Examples with RandomDataImpl org.apache.commons.math.random.RandomDataImpl used on opensource projects

Example 1 with RandomDataImpl

use of org.apache.commons.math.random.RandomDataImpl in project knime-core by knime.

the class RFSubsetColumnSampleStrategy method getColumnSampleForTreeNode.

/**
 * {@inheritDoc}
 */
@Override
public ColumnSample getColumnSampleForTreeNode(final TreeNodeSignature treeNodeSignature) {
    byte[] signature = treeNodeSignature.getSignaturePath();
    JDKRandomGenerator generator = new JDKRandomGenerator();
    generator.setSeed(m_seed);
    int[] newSeed = new int[signature.length];
    for (int i = 0; i < signature.length; i++) {
        for (int p = 0; p <= signature[i]; p++) {
            newSeed[i] = generator.nextInt();
        }
    }
    generator.setSeed(newSeed);
    int totalColCount = m_data.getColumns().length;
    RandomData rd = new RandomDataImpl(generator);
    int[] includes = rd.nextPermutation(totalColCount, m_subsetSize);
    Arrays.sort(includes);
    return new SubsetColumnSample(m_data, includes);
}

Example 2 with RandomDataImpl

use of org.apache.commons.math.random.RandomDataImpl in project knime-core by knime.

the class RandomBinarySplitEnumerationTest method testFullEnumeration.

/**
 * Tests random enumeration on all possible masks. All valid values must be returned, no duplicates
 * expected.
 */
@Test
public void testFullEnumeration() {
    final int valueCount = 16;
    final int validCount = (int) Math.pow(2, valueCount - 1) - 1;
    /* Reference enumeration */
    final FullBinarySplitEnumeration fullEnum = new FullBinarySplitEnumeration(valueCount);
    final HashSet<BigInteger> allAvailableBS = new HashSet<>();
    do {
        allAvailableBS.add(fullEnum.getValueMask());
    } while (fullEnum.next());
    /* random enum to test */
    RandomBinarySplitEnumeration randomEnum = new RandomBinarySplitEnumeration(valueCount, validCount, new RandomDataImpl());
    int i = 0;
    do {
        BigInteger valueMask = randomEnum.getValueMask();
        if (!allAvailableBS.remove(valueMask)) {
            Assert.fail("value mask appeared twice: " + valueMask + " (this is iteration " + i + ".)");
        }
        i++;
    } while (randomEnum.next());
    if (!allAvailableBS.isEmpty()) {
        Assert.fail("Some value masks not returned (" + allAvailableBS.size() + " left)");
    }
}

Example 3 with RandomDataImpl

use of org.apache.commons.math.random.RandomDataImpl in project knime-core by knime.

the class TestDataGenerator method createRandomData.

public static RandomData createRandomData() {
    JDKRandomGenerator randomGenerator = new JDKRandomGenerator();
    randomGenerator.setSeed(System.currentTimeMillis());
    return new RandomDataImpl(randomGenerator);
}

Example 4 with RandomDataImpl

use of org.apache.commons.math.random.RandomDataImpl in project knime-core by knime.

the class TreeEnsembleLearnerConfiguration method createRandomData.

/**
 * @param seed
 * @return RandomData created from <b>seed</b>
 */
public static RandomData createRandomData(final long seed) {
    JDKRandomGenerator randomGenerator = new JDKRandomGenerator();
    randomGenerator.setSeed(seed);
    return new RandomDataImpl(randomGenerator);
}

Example 5 with RandomDataImpl

use of org.apache.commons.math.random.RandomDataImpl in project knime-core by knime.

the class TreeEnsembleLearnerConfiguration method createRandomData.

/**
 * @param seed
 * @return RandomData created from <b>seed</b>
 */
public static RandomData createRandomData(final long seed) {
    JDKRandomGenerator randomGenerator = new JDKRandomGenerator();
    randomGenerator.setSeed(seed);
    return new RandomDataImpl(randomGenerator);
}