Examples of org.apache.commons.math.random.RandomData.nextPermutation()

Class org.apache.commons.math.random.RandomData

Examples of org.apache.commons.math.random.RandomData.nextPermutation()

org.apache.commons.math.random.RandomData.nextPermutation()
Generates an integer array of length k whose entries are selected randomly, without repetition, from the integers 0 through n-1 (inclusive).
Generated arrays represent permutations of n taken k at a time.

Preconditions:
- k <= n
- n > 0
If the preconditions are not met, an IllegalArgumentException is thrown.
@param n domain of the permutation @param k size of the permutation @return random k-permutation of n

        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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