repicea.stats

Class RandomVariable<D extends Distribution>

java.lang.Object

repicea.stats.RandomVariable<D>

Type Parameters:

D - a Distribution derived instance

All Implemented Interfaces:

java.io.Serializable, CentralMomentsGettable

Direct Known Subclasses:

Estimate

public abstract class RandomVariable<D extends Distribution>
extends java.lang.Object
implements CentralMomentsGettable, java.io.Serializable

The RandomVariable class ensures the instance can provide its two first central moments (i.e. mean and variance) as well as a distribution. The parameter D sets the distribution of the random variables (see the repicea.stats.distributions package)

See Also:

Serialized Form

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	RandomVariable(D distribution)

Method Summary

Modifier and Type	Method and Description
D	getDistribution() This method returns the assumed distribution for the random variable.
Matrix	getMean() This method returns the first central moment, i.e.
Matrix	getVariance() This method returns the second central moment, i.e.

Methods inherited from class java.lang.Object

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

Constructor Detail

RandomVariable

protected RandomVariable(D distribution)

Method Detail

getDistribution

public D getDistribution()

This method returns the assumed distribution for the random variable.

Returns:

a Distribution-derived instance

getMean

public Matrix getMean()

Description copied from interface: CentralMomentsGettable

This method returns the first central moment, i.e. the mean vector, of the random variable.

Specified by:

getMean in interface CentralMomentsGettable

Returns:

a Matrix instance

getVariance

public Matrix getVariance()

Description copied from interface: CentralMomentsGettable

This method returns the second central moment, i.e. the variance-covariance matrix, of the random variable.

Specified by:

getVariance in interface CentralMomentsGettable

Returns:

a Number instance