public Class ExponentialDecayFunction

Class Inheritance

extends Object

Imports

Exponential decay function: a e^{-x / b}, where x is the (integer) independent variable.
Class is immutable.

Field Summary

Modifier and Type	Field and Description
private final double	a Factor `a`.
private final double	oneOverB Factor `1 / b`.

Access	Constructor and Description
public	ExponentialDecayFunction(double Initial value, i.e. `value(0)`. initValue, double Value of the function at `numCall`. valueAtNumCall, long Argument for which the function returns `valueAtNumCall`. numCall) Creates an instance.

Modifier and Type	Method and Description
public double	Returns: the value of the function at `numCall`. value(long Current step of the training task. numCall) Computes `a e^{-numCall / b}`.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

a	back to summary
private final double a Factor `a`.

oneOverB	back to summary
private final double oneOverB Factor `1 / b`.

ExponentialDecayFunction back to summary

ExponentialDecayFunction	back to summary
public ExponentialDecayFunction(double initValue, double valueAtNumCall, long numCall) Creates an instance. It will be such that `a = initValue` `b = -numCall / ln(valueAtNumCall / initValue)` Parameters initValue:double Initial value, i.e. `value(0)`. valueAtNumCall:double Value of the function at `numCall`. numCall:long Argument for which the function returns `valueAtNumCall`. Exceptions NotStrictlyPositiveException: if `initValue <= 0`. if `valueAtNumCall <= 0`. if `numCall <= 0`. NumberIsTooLargeException: if `valueAtNumCall >= initValue`.

public ExponentialDecayFunction(double initValue, double valueAtNumCall, long numCall)

Creates an instance. It will be such that

Parameters

Exceptions

NotStrictlyPositiveException:

if valueAtNumCall >= initValue.

value back to summary

value	back to summary
public double value(long numCall) Computes `a e^{-numCall / b}`. Parameters numCall:long Current step of the training task. Returns:double the value of the function at `numCall`.

public double value(long numCall)

Computes a e^{-numCall / b}.

Parameters

Returns:double

the value of the function at numCall.