Developer API

org.apache.spark.util.random

Class BernoulliSampler<T>

Object

org.apache.spark.util.random.BernoulliSampler<T>

Type Parameters:

T - item type

All Implemented Interfaces:

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

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

A sampler based on Bernoulli trials.

param: fraction the sampling fraction, aka Bernoulli sampling probability

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
BernoulliSampler(double fraction, scala.reflect.ClassTag<T> evidence$1)

Method Summary

Modifier and Type	Method and Description
BernoulliSampler<T>	clone() return a copy of the RandomSampler object
int	sample() Whether to sample the next item or not.
void	setSeed(long seed) Set random seed.

Methods inherited from class Object

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

Methods inherited from interface org.apache.spark.util.random.RandomSampler

sample

Constructor Detail

BernoulliSampler

public BernoulliSampler(double fraction,
                        scala.reflect.ClassTag<T> evidence$1)

Method Detail

clone

public BernoulliSampler<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

sample

public int sample()

Description copied from interface: RandomSampler

Whether to sample the next item or not. Return how many times the next item will be sampled. Return 0 if it is not sampled.

Specified by:

sample in interface RandomSampler<T,T>

Returns:

(undocumented)

setSeed

public void setSeed(long seed)

Description copied from interface: Pseudorandom

Set random seed.

Specified by:

setSeed in interface Pseudorandom