Package org.nlpub.watset.util

Class Vectors

java.lang.Object

org.nlpub.watset.util.Vectors

public final class Vectors
extends Object

Utilities for mapping bags-of-words to real-valued vectors.

See Also:

Dot products

Method Summary

Modifier and Type	Method	Description
static <V> org.apache.commons.math3.linear.RealVector	transform(Map<V,Number> bag)	Transform the bag-of-words into a real-valued vector.
static <V> org.apache.commons.math3.linear.RealVector	transform(Map<V,Number> bag, Collection<V> domain)	Transform the bag-of-words into a real-valued vector.

Methods inherited from class java.lang.Object

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

Method Detail

transform

public static <V> org.apache.commons.math3.linear.RealVector transform(Map<V,Number> bag)

Transform the bag-of-words into a real-valued vector.

The number of elements in the vector is equal to the size of the key set of the given bag.

Type Parameters:

V - the type of bag elements

Parameters:

bag - the bag-of-words

Returns:

a real-valued vector

transform

public static <V> org.apache.commons.math3.linear.RealVector transform(Map<V,Number> bag,
                                                                       Collection<V> domain)

Transform the bag-of-words into a real-valued vector.

The number of elements in the vector is equal to the size of the domain set.

Please make sure that all elements in domain are unique.

Type Parameters:

V - the type of bag elements

Parameters:

bag - the bag-of-words

domain - the collection of allowed elements of bag

Returns:

a real-valued vector