org.apache.mahout.vectorizer.encoders
Class ConstantValueEncoder

java.lang.Object
  extended by org.apache.mahout.vectorizer.encoders.FeatureVectorEncoder
      extended by org.apache.mahout.vectorizer.encoders.CachingValueEncoder
          extended by org.apache.mahout.vectorizer.encoders.ConstantValueEncoder

public class ConstantValueEncoder
extends CachingValueEncoder

An encoder that does the standard thing for a virtual bias term.


Field Summary
 
Fields inherited from class org.apache.mahout.vectorizer.encoders.FeatureVectorEncoder
CONTINUOUS_VALUE_HASH_SEED, WORD_LIKE_VALUE_HASH_SEED
 
Constructor Summary
ConstantValueEncoder(String name)
           
 
Method Summary
 void addToVector(byte[] originalForm, double weight, Vector data)
           
 String asString(String originalForm)
          Converts a value into a form that would help a human understand the internals of how the value is being interpreted.
protected  int getSeed()
           
protected  double getWeight(byte[] originalForm, double w)
           
 
Methods inherited from class org.apache.mahout.vectorizer.encoders.CachingValueEncoder
hashForProbe, setProbes
 
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

ConstantValueEncoder

public ConstantValueEncoder(String name)
Method Detail

addToVector

public void addToVector(byte[] originalForm,
                        double weight,
                        Vector data)
Specified by:
addToVector in class FeatureVectorEncoder

getWeight

protected double getWeight(byte[] originalForm,
                           double w)
Overrides:
getWeight in class FeatureVectorEncoder

asString

public String asString(String originalForm)
Description copied from class: FeatureVectorEncoder
Converts a value into a form that would help a human understand the internals of how the value is being interpreted. For text-like things, this is likely to be a list of the terms found with associated weights (if any).

Specified by:
asString in class FeatureVectorEncoder
Parameters:
originalForm - The original form of the value as a string.
Returns:
A string that a human can read.

getSeed

protected int getSeed()
Specified by:
getSeed in class CachingValueEncoder


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