org.apache.ignite.ml.dataset.feature

Class ObjectHistogram<T>

java.lang.Object

org.apache.ignite.ml.dataset.feature.ObjectHistogram<T>

Type Parameters:

T - Type of object for histogram.

All Implemented Interfaces:

Serializable, DistributionComputer, Histogram<T,ObjectHistogram<T>>

Direct Known Subclasses:

BootstrappedVectorsHistogram

public abstract class ObjectHistogram<T>
extends Object
implements Histogram<T,ObjectHistogram<T>>, DistributionComputer

Basic implementation of Histogram that implements also DistributionComputer.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ObjectHistogram()

Method Summary

Modifier and Type	Method and Description
void	addElement(T val) Add object to histogram.
Set<Integer>	buckets()
TreeMap<Integer,Double>	computeDistributionFunction() Compute distribution function.
Optional<Double>	getValue(Integer bucketId)
boolean	isEqualTo(ObjectHistogram<T> other) Compares histogram with other and returns true if they are equals
abstract Integer	mapToBucket(T obj) Bucket mapping.
abstract Double	mapToCounter(T obj) Counter mapping.
abstract ObjectHistogram<T>	newInstance() Creates an instance of ObjectHistogram from child class.
ObjectHistogram<T>	plus(ObjectHistogram<T> other)

Methods inherited from class java.lang.Object

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

Constructor Detail

ObjectHistogram

public ObjectHistogram()

Method Detail

addElement

public void addElement(T val)

Add object to histogram.

Specified by:

addElement in interface Histogram<T,ObjectHistogram<T>>

Parameters:

val - Value.

buckets

public Set<Integer> buckets()

Specified by:

buckets in interface Histogram<T,ObjectHistogram<T>>

Returns:

Bucket ids.

getValue

public Optional<Double> getValue(Integer bucketId)

Specified by:

getValue in interface Histogram<T,ObjectHistogram<T>>

Parameters:

bucketId - Bucket id.

Returns:

Value in according to bucket id.

computeDistributionFunction

public TreeMap<Integer,Double> computeDistributionFunction()

Compute distribution function.

Specified by:

computeDistributionFunction in interface DistributionComputer

Returns:

Map represents discrete distribution function.

plus

public ObjectHistogram<T> plus(ObjectHistogram<T> other)

Specified by:

plus in interface Histogram<T,ObjectHistogram<T>>

Parameters:

other - Other histogram.

Returns:

Sum of this and other histogram.

isEqualTo

public boolean isEqualTo(ObjectHistogram<T> other)

Compares histogram with other and returns true if they are equals

Specified by:

isEqualTo in interface Histogram<T,ObjectHistogram<T>>

Parameters:

other - Other histogram.

Returns:

True if histograms are equal.

mapToBucket

public abstract Integer mapToBucket(T obj)

Bucket mapping.

Parameters:

obj - Object.

Returns:

BucketId.

mapToCounter

public abstract Double mapToCounter(T obj)

Counter mapping.

Parameters:

obj - Object.

Returns:

Counter.

newInstance

public abstract ObjectHistogram<T> newInstance()

Creates an instance of ObjectHistogram from child class.

Returns:

Object histogram.