org.apache.spark.util.random

Class PoissonBounds

Object

org.apache.spark.util.random.PoissonBounds

public class PoissonBounds
extends Object

Utility functions that help us determine bounds on adjusted sampling rate to guarantee exact sample sizes with high confidence when sampling with replacement.

Constructor Summary

Constructors

Constructor and Description
PoissonBounds()

Method Summary

Methods

Modifier and Type	Method and Description
static double	getLowerBound(double s) Returns a lambda such that Pr[X > s] is very small, where X ~ Pois(lambda).
static double	getUpperBound(double s) Returns a lambda such that Pr[X < s] is very small, where X ~ Pois(lambda).

Methods inherited from class Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PoissonBounds

public PoissonBounds()

Method Detail

getLowerBound

public static double getLowerBound(double s)

Returns a lambda such that Pr[X > s] is very small, where X ~ Pois(lambda).

Parameters:

s - (undocumented)

Returns:

(undocumented)

getUpperBound

public static double getUpperBound(double s)

Returns a lambda such that Pr[X < s] is very small, where X ~ Pois(lambda).

Parameters:

s - sample size

Returns:

(undocumented)