io.improbable.keanu.vertices.generic.nonprobabilistic

Class ConstantVertex<T>

java.lang.Object

io.improbable.keanu.vertices.Vertex<T>

io.improbable.keanu.vertices.generic.nonprobabilistic.NonProbabilistic<T>

io.improbable.keanu.vertices.generic.nonprobabilistic.ConstantVertex<T>

All Implemented Interfaces:

Identifiable, Constant<T>

public class ConstantVertex<T>
extends NonProbabilistic<T>
implements Constant<T>

Field Summary

Fields inherited from class io.improbable.keanu.vertices.Vertex

idGenerator

Constructor Summary

Constructors

Constructor and Description
ConstantVertex(T value)

Method Summary

Modifier and Type	Method and Description
T	getDerivedValue()
T	lazyEval() This causes a backwards propagating calculation of the vertex value.
T	sample()

Methods inherited from class io.improbable.keanu.vertices.generic.nonprobabilistic.NonProbabilistic

dDensityAtValue, density, isProbabilistic, updateValue

Methods inherited from class io.improbable.keanu.vertices.Vertex

addChild, addParent, addParents, densityAtValue, dlnDensityAtValue, equals, getChildren, getConnectedGraph, getId, getParents, getValue, hashCode, isObserved, logDensity, logDensityAtValue, observe, observeOwnValue, setAndCascade, setParents, setParents, setValue, unobserve, updateChildren

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.improbable.keanu.vertices.Constant

getValue

Constructor Detail

ConstantVertex

public ConstantVertex(T value)

Method Detail

sample

public T sample()

Specified by:

sample in class Vertex<T>

Returns:

a sample from the vertex's distribution. For non-probabilistic vertices, this will always be the same value.

lazyEval

public T lazyEval()

Description copied from class: Vertex

This causes a backwards propagating calculation of the vertex value. This propagation only happens for vertices with values dependent on parent values i.e. non-probabilistic vertices.

Specified by:

lazyEval in class Vertex<T>

Returns:

The value at this vertex after recalculating any parent non-probabilistic vertices.

getDerivedValue

public T getDerivedValue()

Specified by:

getDerivedValue in class NonProbabilistic<T>