com.penguinwerks.jodene.data
Class NMinusOneClassTranslator

java.lang.Object
  com.penguinwerks.jodene.data.Translator
      com.penguinwerks.jodene.data.NMinusOneClassTranslator

All Implemented Interfaces:

java.io.Serializable

public class NMinusOneClassTranslator

extends Translator

implements java.io.Serializable

This class encodes a set of values using N-1 encoding, that is, if it a class with K members is encoded using K-1 values. For example:
Assume the class has the values {"dog", "cat", "gold-fish"} and these values are defined in that order for this translator:

• "dog" -> 0.0, 0.0
• "cat" -> 1.0, 0.0
• "gold-fish" -> 0.0, 1.0

Author:

Paul Hoehne

See Also:

Serialized Form

Constructor Summary

NMinusOneClassTranslator()

Method Summary

int	getOutputSize() The numer of doubles in the output array.
double[]	translate(java.lang.String values) The N-1 translator returns N-1 doubles for N possible strings.

Methods inherited from class com.penguinwerks.jodene.data.Translator

addKey

Methods inherited from class java.lang.Object

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

Constructor Detail

NMinusOneClassTranslator

public NMinusOneClassTranslator()

Method Detail

translate

public double[] translate(java.lang.String values)
                   throws TranslatorException

The N-1 translator returns N-1 doubles for N possible strings. For example, if the strings are { "car", "plane", "train", "boat" } then there are 4 possible strings of 3 values { 0.0, 0.0, 0.0 } for "car", { 1.0, 0.0, 0.0 } for "plane", { 0.0, 1.0, 0.0 } for "traine", and { 0.0, 0.0, 1.0 } for "boat". If an unexpected string is entered, "rocket", for example, then an exception is thrown.

Specified by:

translate in class Translator

Parameters:

values - The string to be translated.

Returns:

The array representing this string.

Throws:

TranslatorException - Thrown if the string is not a known class.

getOutputSize

public int getOutputSize()

The numer of doubles in the output array.

Specified by:

getOutputSize in class Translator

Returns:

The size of the output array.