org.apache.spark.ml.attribute

Class NominalAttribute

Object

org.apache.spark.ml.attribute.Attribute

org.apache.spark.ml.attribute.NominalAttribute

All Implemented Interfaces:

java.io.Serializable

public class NominalAttribute
extends Attribute

A nominal attribute. param: name optional name param: index optional index param: isOrdinal whether this attribute is ordinal (optional) param: numValues optional number of values. At most one of numValues and values can be defined. param: values optional values. At most one of numValues and values can be defined.

See Also:

Serialized Form

Method Summary

Modifier and Type	Method and Description
AttributeType	attrType() Attribute type.
static NominalAttribute	defaultAttr() The default nominal attribute.
boolean	equals(Object other)
static Attribute	fromStructField(StructField field)
scala.Option<Object>	getNumValues() Get the number of values, either from numValues or from values.
String	getValue(int index) Gets a value given its index.
int	hashCode()
boolean	hasValue(String value) Tests whether this attribute contains a specific value.
scala.Option<Object>	index() Index of the attribute.
int	indexOf(String value) Index of a specific value.
boolean	isNominal() Tests whether this attribute is nominal, true for NominalAttribute and BinaryAttribute.
boolean	isNumeric() Tests whether this attribute is numeric, true for NumericAttribute and BinaryAttribute.
scala.Option<Object>	isOrdinal()
scala.Option<String>	name() Name of the attribute.
scala.Option<Object>	numValues()
scala.Option<String[]>	values()
NominalAttribute	withIndex(int index) Copy with a new index.
NominalAttribute	withName(String name) Copy with a new name.
NominalAttribute	withNumValues(int numValues) Copy with a new numValues and empty values.
NominalAttribute	withoutIndex() Copy without the index.
NominalAttribute	withoutName() Copy without the name.
NominalAttribute	withoutNumValues() Copy without the numValues.
NominalAttribute	withoutValues() Copy without the values.
NominalAttribute	withValues(String[] values) Copy with new values and empty numValues.
NominalAttribute	withValues(String first, scala.collection.Seq<String> others) Copy with new values and empty numValues.
NominalAttribute	withValues(String first, String... others) Copy with new values and empty numValues.

Methods inherited from class org.apache.spark.ml.attribute.Attribute

toMetadata, toMetadata, toString, toStructField, toStructField

Methods inherited from class Object

getClass, notify, notifyAll, wait, wait, wait

Method Detail

defaultAttr

public static final NominalAttribute defaultAttr()

The default nominal attribute.

fromStructField

public static Attribute fromStructField(StructField field)

withValues

public NominalAttribute withValues(String first,
                                   String... others)

Copy with new values and empty numValues.

Parameters:

first - (undocumented)

others - (undocumented)

Returns:

(undocumented)

name

public scala.Option<String> name()

Description copied from class: Attribute

Name of the attribute. None if it is not set.

Specified by:

name in class Attribute

index

public scala.Option<Object> index()

Description copied from class: Attribute

Index of the attribute. None if it is not set.

Specified by:

index in class Attribute

isOrdinal

public scala.Option<Object> isOrdinal()

numValues

public scala.Option<Object> numValues()

values

public scala.Option<String[]> values()

attrType

public AttributeType attrType()

Description copied from class: Attribute

Attribute type.

Specified by:

attrType in class Attribute

isNumeric

public boolean isNumeric()

Description copied from class: Attribute

Tests whether this attribute is numeric, true for NumericAttribute and BinaryAttribute.

Specified by:

isNumeric in class Attribute

Returns:

(undocumented)

isNominal

public boolean isNominal()

Description copied from class: Attribute

Tests whether this attribute is nominal, true for NominalAttribute and BinaryAttribute.

Specified by:

isNominal in class Attribute

Returns:

(undocumented)

indexOf

public int indexOf(String value)

Index of a specific value.

hasValue

public boolean hasValue(String value)

Tests whether this attribute contains a specific value.

getValue

public String getValue(int index)

Gets a value given its index.

withName

public NominalAttribute withName(String name)

Description copied from class: Attribute

Copy with a new name.

Specified by:

withName in class Attribute

withoutName

public NominalAttribute withoutName()

Description copied from class: Attribute

Copy without the name.

Specified by:

withoutName in class Attribute

withIndex

public NominalAttribute withIndex(int index)

Description copied from class: Attribute

Copy with a new index.

Specified by:

withIndex in class Attribute

withoutIndex

public NominalAttribute withoutIndex()

Description copied from class: Attribute

Copy without the index.

Specified by:

withoutIndex in class Attribute

withValues

public NominalAttribute withValues(String[] values)

Copy with new values and empty numValues.

Parameters:

values - (undocumented)

Returns:

(undocumented)

withValues

public NominalAttribute withValues(String first,
                                   scala.collection.Seq<String> others)

Copy with new values and empty numValues.

Parameters:

first - (undocumented)

others - (undocumented)

Returns:

(undocumented)

withoutValues

public NominalAttribute withoutValues()

Copy without the values.

withNumValues

public NominalAttribute withNumValues(int numValues)

Copy with a new numValues and empty values.

Parameters:

numValues - (undocumented)

Returns:

(undocumented)

withoutNumValues

public NominalAttribute withoutNumValues()

Copy without the numValues.

Returns:

(undocumented)

getNumValues

public scala.Option<Object> getNumValues()

Get the number of values, either from numValues or from values. Return None if unknown.

Returns:

(undocumented)

equals

public boolean equals(Object other)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object