org.apache.spark.util.random
Class PoissonSampler<T>

Object
  org.apache.spark.util.random.PoissonSampler<T>

All Implemented Interfaces:

java.io.Serializable, Cloneable, Pseudorandom, RandomSampler<T,T>

public class PoissonSampler<T>
extends Object
implements RandomSampler<T,T>

:: DeveloperApi :: A sampler for sampling with replacement, based on values drawn from Poisson distribution.

param: fraction the sampling fraction (with replacement)

See Also:

Serialized Form

Constructor Summary

PoissonSampler(double fraction, scala.reflect.ClassTag<T> evidence$2)

Method Summary

PoissonSampler<T>	clone() return a copy of the RandomSampler object
scala.collection.Iterator<T>	sample(scala.collection.Iterator<T> items) take a random sample
void	setSeed(long seed) Set random seed.

Methods inherited from class Object

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

Constructor Detail

PoissonSampler

public PoissonSampler(double fraction,
                      scala.reflect.ClassTag<T> evidence$2)

Method Detail

setSeed

public void setSeed(long seed)

Description copied from interface: Pseudorandom

Set random seed.

Specified by:

setSeed in interface Pseudorandom

sample

public scala.collection.Iterator<T> sample(scala.collection.Iterator<T> items)

Description copied from interface: RandomSampler

take a random sample

Specified by:

sample in interface RandomSampler<T,T>

clone

public PoissonSampler<T> clone()

Description copied from interface: RandomSampler

return a copy of the RandomSampler object

Specified by:

clone in interface RandomSampler<T,T>

Overrides:

clone in class Object