org.apache.flink.api.java.sampling

Class RandomSampler<T>

java.lang.Object

org.apache.flink.api.java.sampling.RandomSampler<T>

Type Parameters:

T - The type of sampler data.

Direct Known Subclasses:

BernoulliSampler, DistributedRandomSampler, PoissonSampler

@Internal
public abstract class RandomSampler<T>
extends Object

A data sample is a set of data selected from a statistical population by a defined procedure. RandomSampler helps to create data sample randomly.

Field Summary

Fields

Modifier and Type	Field and Description
protected Iterator<T>	emptyIterable
protected static double	EPSILON

Constructor Summary

Constructors

Constructor and Description
RandomSampler()

Method Summary

Modifier and Type	Method and Description
abstract Iterator<T>	sample(Iterator<T> input) Randomly sample the elements from input in sequence, and return the result iterator.

Methods inherited from class java.lang.Object

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

Field Detail

EPSILON

protected static final double EPSILON

See Also:

Constant Field Values

emptyIterable

protected final Iterator<T> emptyIterable

Constructor Detail

RandomSampler

public RandomSampler()

Method Detail

sample

public abstract Iterator<T> sample(Iterator<T> input)

Randomly sample the elements from input in sequence, and return the result iterator.

Parameters:

input - Source data

Returns:

The sample result.