nars.entity
Class TruthValue

java.lang.Object
  nars.entity.TruthValue

public class TruthValue
extends java.lang.Object

Frequency and confidence.

Field Summary

protected ShortFloat	confidence The confidence factor of the truth value
private static char	DELIMITER The charactor that marks the two ends of a truth value
protected ShortFloat	frequency The frequency factor of the truth value
private static char	SEPARATOR The charactor that separates the factors in a truth value

Constructor Summary

TruthValue(float f, float c)
Constructor with two ShortFloats

TruthValue(TruthValue v)
Constructor with a TruthValue to clone

Method Summary

boolean	equals(java.lang.Object that) Compare two truth values
float	getConfidence() Get the confidence value
float	getExpDifAbs(TruthValue t) Calculate the absolute difference of the expectation value and that of a given truth value
float	getExpectation() Calculate the expectation value of the truth value
float	getFrequency() Get the frequency value
int	hashCode() The hash code of a TruthValue
java.lang.String	toString() The String representation of a TruthValue
java.lang.String	toString2() A simplified String representation of a TruthValue, where each factor is accruate to 1%

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

DELIMITER

private static final char DELIMITER

The charactor that marks the two ends of a truth value

See Also:

Constant Field Values

SEPARATOR

private static final char SEPARATOR

The charactor that separates the factors in a truth value

See Also:

Constant Field Values

frequency

protected ShortFloat frequency

The frequency factor of the truth value

confidence

protected ShortFloat confidence

The confidence factor of the truth value

Constructor Detail

TruthValue

public TruthValue(float f,
                  float c)

Constructor with two ShortFloats

Parameters:

f - The frequency value

c - The confidence value

TruthValue

public TruthValue(TruthValue v)

Constructor with a TruthValue to clone

Parameters:

v - The truth value to be cloned

Method Detail

getFrequency

public float getFrequency()

Get the frequency value

Returns:

The frequency value

getConfidence

public float getConfidence()

Get the confidence value

Returns:

The confidence value

getExpectation

public float getExpectation()

Calculate the expectation value of the truth value

Returns:

The expectation value

getExpDifAbs

public float getExpDifAbs(TruthValue t)

Calculate the absolute difference of the expectation value and that of a given truth value

Parameters:

t - The given value

Returns:

The absolute difference

equals

public boolean equals(java.lang.Object that)

Compare two truth values

Overrides:

equals in class java.lang.Object

Parameters:

that - The other TruthValue

Returns:

Whether the two are equivalent

hashCode

public int hashCode()

The hash code of a TruthValue

Overrides:

hashCode in class java.lang.Object

Returns:

The hash code

toString

public java.lang.String toString()

The String representation of a TruthValue

Overrides:

toString in class java.lang.Object

Returns:

The String

toString2

public java.lang.String toString2()

A simplified String representation of a TruthValue, where each factor is accruate to 1%

Returns:

The String