io.cdap.wrangler.sampling

Class Sampler<T>

java.lang.Object

io.cdap.wrangler.sampling.Sampler<T>

Type Parameters:

T - type of element to sample

Direct Known Subclasses:

Bernoulli, Poisson, Reservoir

@PublicEvolving
public abstract class Sampler<T>
extends Object

This class is interface for implementing Sampler. It provides a set of data selected from a statistical population by the defined implementation. It helps create random samples of data easily.

Field Summary

Fields

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

Constructor Summary

Constructors

Constructor and Description
Sampler()

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

Sampler

public Sampler()

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 - Scope data

Returns:

The sample result.