org.apache.mahout.vectorizer.encoders

Class CachingContinuousValueEncoder

java.lang.Object

org.apache.mahout.vectorizer.encoders.FeatureVectorEncoder

org.apache.mahout.vectorizer.encoders.CachingValueEncoder

org.apache.mahout.vectorizer.encoders.ContinuousValueEncoder

org.apache.mahout.vectorizer.encoders.CachingContinuousValueEncoder

public class CachingContinuousValueEncoder
extends ContinuousValueEncoder

Field Summary

Fields inherited from class org.apache.mahout.vectorizer.encoders.FeatureVectorEncoder

CONTINUOUS_VALUE_HASH_SEED, WORD_LIKE_VALUE_HASH_SEED

Constructor Summary

Constructors

Constructor and Description
CachingContinuousValueEncoder(String name, int dataSize)

Method Summary

Modifier and Type	Method and Description
protected int	hashForProbe(byte[] originalForm, int dataSize, String name, int probe) Provides the unique hash for a particular probe.
void	setProbes(int probes) Sets the number of locations in the feature vector that a value should be in.

Methods inherited from class org.apache.mahout.vectorizer.encoders.ContinuousValueEncoder

addToVector, asString, getSeed, getWeight

Methods inherited from class org.apache.mahout.vectorizer.encoders.FeatureVectorEncoder

addToVector, addToVector, addToVector, bytesForString, getName, getProbes, hash, hash, hash, hash, hash, hashesForProbe, isTraceEnabled, setTraceDictionary, trace, trace

Methods inherited from class java.lang.Object

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

Constructor Detail

CachingContinuousValueEncoder

public CachingContinuousValueEncoder(String name,
                                     int dataSize)

Method Detail

setProbes

public void setProbes(int probes)

Description copied from class: CachingValueEncoder

Sets the number of locations in the feature vector that a value should be in. This causes the cached probe locations to be recomputed.

Overrides:

setProbes in class CachingValueEncoder

Parameters:

probes - Number of locations to increment.

hashForProbe

protected int hashForProbe(byte[] originalForm,
                           int dataSize,
                           String name,
                           int probe)

Description copied from class: FeatureVectorEncoder

Provides the unique hash for a particular probe. For all encoders except text, this is all that is needed and the default implementation of hashesForProbe will do the right thing. For text and similar values, hashesForProbe should be over-ridden and this method should not be used.

Overrides:

hashForProbe in class CachingValueEncoder

Parameters:

originalForm - The original byte array value

dataSize - The length of the vector being encoded

name - The name of the variable being encoded

probe - The probe number

Returns:

The hash of the current probe