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,LabeledVector>, IgniteBiFunction<K,V,LabeledVector>, Preprocessor<K,V>

Direct Known Subclasses:

FrequencyEncoderPreprocessor, LabelEncoderPreprocessor, OneHotEncoderPreprocessor, StringEncoderPreprocessor, TargetEncoderPreprocessor

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

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 Preprocessor<K,V>	basePreprocessor Base preprocessor.
protected Map<String,Integer>[]	encodingValues Filling values.
protected Set<Integer>	handledIndices Feature indices to apply encoder.
static String	KEY_FOR_NULL_VALUES
protected Map<String,Integer>	labelFrequencies Frequencies of categories for label presented as strings.

Constructor Summary

Constructors

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

map

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

public static final String KEY_FOR_NULL_VALUES

See Also:

Constant Field Values

encodingValues

protected Map<String,Integer>[] encodingValues

Filling values.

labelFrequencies

protected Map<String,Integer> labelFrequencies

Frequencies of categories for label presented as strings.

basePreprocessor

protected final Preprocessor<K,V> basePreprocessor

Base preprocessor.

handledIndices

protected Set<Integer> handledIndices

Feature indices to apply encoder.

Constructor Detail

EncoderPreprocessor

protected EncoderPreprocessor(Map<String,Integer>[] encodingValues,
                              Preprocessor<K,V> basePreprocessor,
                              Set<Integer> handledIndices)

Constructs a new instance of Encoder preprocessor.

Parameters:

basePreprocessor - Base preprocessor.

handledIndices - Handled indices.

EncoderPreprocessor

protected EncoderPreprocessor(Map<String,Integer> labelFrequencies,
                              Preprocessor<K,V> basePreprocessor)

Constructs a new instance of Encoder preprocessor.

Parameters:

basePreprocessor - Base preprocessor.