Examples of com.facebook.LinkBench.distributions.ProbabilityDistribution.quantile()

com.facebook.LinkBench.distributions.ProbabilityDistribution.quantile()
Quantile function for the distribution @return x such that Pr(X <= x) = p

  public void testQuantileSanity() {
    long min = 0, max = 1000;
    ProbabilityDistribution dist = getDist();
    dist.init(min, max, getDistParams(), "");


    long last = dist.quantile(0.0);
    for (double q = 0.0; q <= 1.0; q += 0.125) {
      long id = dist.quantile(q);
      System.err.format("quantile(%f) = %d\n", q, id);
      assertTrue(id >= min);
      assertTrue(id < max);

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    ProbabilityDistribution dist = getDist();
    dist.init(min, max, getDistParams(), "");


    long last = dist.quantile(0.0);
    for (double q = 0.0; q <= 1.0; q += 0.125) {
      long id = dist.quantile(q);
      System.err.format("quantile(%f) = %d\n", q, id);
      assertTrue(id >= min);
      assertTrue(id < max);
      assertTrue(id >= last);
      last = id;

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      last = id;
    }


    // min should be most probable, and therefore should definitely
    // be returned by quantile
    assertEquals(min, dist.quantile(0.0));
  }


  /**
   * Different distributions should be bucketed in different ways
   * to test their fit.  For example, the zipf distribution treats

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