org.apache.ignite.ml.preprocessing.encoding

Class EncoderPreprocessor<K,V>

java.lang.Object

org.apache.ignite.ml.preprocessing.encoding.EncoderPreprocessor<K,V>

Type Parameters:

K - Type of a key in upstream data.

V - Type of a value in upstream data.

All Implemented Interfaces:

Serializable, BiFunction<K,V,Vector>, IgniteBiFunction<K,V,Vector>

Direct Known Subclasses:

OneHotEncoderPreprocessor, StringEncoderPreprocessor

public abstract class EncoderPreprocessor<K,V>
extends Object
implements IgniteBiFunction<K,V,Vector>

Preprocessing function that makes encoding. This a base abstract class that keeps the common fields for all child encoding preprocessors.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected IgniteBiFunction<K,V,Object[]>	basePreprocessor Base preprocessor.
protected Map<String,Integer>[]	encodingValues Filling values.
protected Set<Integer>	handledIndices Feature indices to apply encoder.
protected static String	KEY_FOR_NULL_VALUES

Constructor Summary

Constructors

Constructor and Description
EncoderPreprocessor(Map<String,Integer>[] encodingValues, IgniteBiFunction<K,V,Object[]> basePreprocessor, Set<Integer> handledIndices) Constructs a new instance of String Encoder preprocessor.

Method Summary

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.ignite.ml.math.functions.IgniteBiFunction

andThen

Methods inherited from interface java.util.function.BiFunction

andThen, apply

Field Detail

KEY_FOR_NULL_VALUES

protected static final String KEY_FOR_NULL_VALUES

See Also:

Constant Field Values

encodingValues

protected final Map<String,Integer>[] encodingValues

Filling values.

basePreprocessor

protected final IgniteBiFunction<K,V,Object[]> basePreprocessor

Base preprocessor.

handledIndices

protected final Set<Integer> handledIndices

Feature indices to apply encoder.

Constructor Detail

EncoderPreprocessor

public EncoderPreprocessor(Map<String,Integer>[] encodingValues,
                           IgniteBiFunction<K,V,Object[]> basePreprocessor,
                           Set<Integer> handledIndices)

Constructs a new instance of String Encoder preprocessor.

Parameters:

basePreprocessor - Base preprocessor.

handledIndices - Handled indices.