nars.inference
Class UtilityFunctions

java.lang.Object
  nars.inference.UtilityFunctions

Direct Known Subclasses:

BudgetFunctions, TruthFunctions

public class UtilityFunctions
extends java.lang.Object

Common functions on real numbers, mostly in [0,1].

Constructor Summary

UtilityFunctions()

Method Summary

static float	and(float... arr) A function where the output is conjunctively determined by the inputs
static float	aveAri(float... arr) A function where the output is the arithmetic average the inputs
static float	aveGeo(float... arr) A function where the output is the geometric average the inputs
static float	or(float... arr) A function where the output is disjunctively determined by the inputs
static float	w2c(float w) A function to convert weight to confidence

Methods inherited from class java.lang.Object

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

Constructor Detail

UtilityFunctions

public UtilityFunctions()

Method Detail

and

public static float and(float... arr)

A function where the output is conjunctively determined by the inputs

Parameters:

arr - The inputs, each in [0, 1]

Returns:

The output that is no larger than each input

or

public static float or(float... arr)

A function where the output is disjunctively determined by the inputs

Parameters:

arr - The inputs, each in [0, 1]

Returns:

The output that is no smaller than each input

aveAri

public static float aveAri(float... arr)

A function where the output is the arithmetic average the inputs

Parameters:

arr - The inputs, each in [0, 1]

Returns:

The arithmetic average the inputs

aveGeo

public static float aveGeo(float... arr)

A function where the output is the geometric average the inputs

Parameters:

arr - The inputs, each in [0, 1]

Returns:

The geometric average the inputs

w2c

public static float w2c(float w)

A function to convert weight to confidence

Parameters:

w - Weight of evidence, a non-negative real number

Returns:

The corresponding confidence, in [0, 1)