org.grouplens.lenskit.transform.truncate

Class TopNTruncator

java.lang.Object

org.grouplens.lenskit.transform.truncate.TopNTruncator

All Implemented Interfaces:

Serializable, VectorTruncator

@Shareable
public class TopNTruncator
extends Object
implements VectorTruncator, Serializable

A VectorTruncator that will retain the top n entries.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
TopNTruncator(int n)
TopNTruncator(int n, Threshold threshold)

Method Summary

Modifier and Type	Method and Description
void	truncate(MutableSparseVector v) Truncate a vector, removing any entries that do not satisfy some condition.

Methods inherited from class java.lang.Object

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

Constructor Detail

TopNTruncator

public TopNTruncator(int n,
                     Threshold threshold)

TopNTruncator

public TopNTruncator(int n)

Method Detail

truncate

public void truncate(MutableSparseVector v)

Description copied from interface: VectorTruncator

Truncate a vector, removing any entries that do not satisfy some condition. The vector is modified in place, i.e. the vector argument will be modified directly.

Specified by:

truncate in interface VectorTruncator

Parameters:

v - The vector to truncate.