datafu.pig.stats.entropy

Class EntropyEstimator

java.lang.Object

datafu.pig.stats.entropy.EntropyEstimator

public abstract class EntropyEstimator
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
protected java.lang.String	base
static java.lang.String	CHAOSHEN_ESTIMATOR
static java.lang.String	EMPIRICAL_ESTIMATOR

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	EntropyEstimator(java.lang.String base)

Method Summary

Modifier and Type	Method and Description
abstract void	accumulate(long cx)
static EntropyEstimator	createEstimator(java.lang.String type, java.lang.String base)
abstract double	getEntropy()
abstract void	reset()

Methods inherited from class java.lang.Object

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

Field Detail

EMPIRICAL_ESTIMATOR

public static final java.lang.String EMPIRICAL_ESTIMATOR

See Also:

Constant Field Values

CHAOSHEN_ESTIMATOR

public static final java.lang.String CHAOSHEN_ESTIMATOR

See Also:

Constant Field Values

base

protected java.lang.String base

Constructor Detail

EntropyEstimator

protected EntropyEstimator(java.lang.String base)
                    throws java.lang.IllegalArgumentException

Throws:

java.lang.IllegalArgumentException

Method Detail

createEstimator

public static EntropyEstimator createEstimator(java.lang.String type,
                                               java.lang.String base)
                                        throws java.lang.IllegalArgumentException

Throws:

java.lang.IllegalArgumentException

accumulate

public abstract void accumulate(long cx)
                         throws org.apache.pig.backend.executionengine.ExecException

Throws:

org.apache.pig.backend.executionengine.ExecException

getEntropy

public abstract double getEntropy()

reset

public abstract void reset()