io.improbable.keanu.vertices.generic.nonprobabilistic

Class NonProbabilistic<T>

java.lang.Object

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

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

Direct Known Subclasses:

BinaryOpVertex, ConstantGenericVertex, CPTVertex, IfVertex, MultiplexerVertex, UnaryOpVertex

public abstract class NonProbabilistic<T>
extends Vertex<T>

Field Summary

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

ID_GENERATOR

Constructor Summary

Constructors

Constructor and Description
NonProbabilistic()

Method Summary

Modifier and Type	Method and Description
java.util.Map<java.lang.Long,DoubleTensor>	dLogProb(T value) The partial derivatives of the natural log prob.
abstract T	getDerivedValue()
boolean	isProbabilistic()
double	logProb(T value) This is the natural log of the probability at the supplied value.
T	updateValue() This causes a non-probabilistic vertex to recalculate it's value based off it's parent's current values.

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

addChild, addParent, addParents, dLogProbAtValue, equals, eval, getChildren, getConnectedGraph, getId, getParents, getRawValue, getShape, getValue, hashCode, hasValue, isObserved, lazyEval, logProbAtValue, observe, observeOwnValue, sample, sample, setAndCascade, setParents, setParents, setValue, unobserve

Methods inherited from class java.lang.Object

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

Constructor Detail

NonProbabilistic

public NonProbabilistic()

Method Detail

logProb

public double logProb(T value)

Description copied from class: Vertex

This is the natural log of the probability at the supplied value. In the case of continuous vertices, this is actually the log of the density, which will differ from the probability by a constant.

Specified by:

logProb in class Vertex<T>

Parameters:

value - The supplied value.

Returns:

The natural log of the probability density at the supplied value

dLogProb

public java.util.Map<java.lang.Long,DoubleTensor> dLogProb(T value)

Description copied from class: Vertex

The partial derivatives of the natural log prob.

Specified by:

dLogProb in class Vertex<T>

Parameters:

value - at a given value

Returns:

the partial derivatives of the log density

isProbabilistic

public boolean isProbabilistic()

Specified by:

isProbabilistic in class Vertex<T>

Returns:

True if the vertex is probabilistic, false otherwise. A probabilistic vertex is defined as a vertex whose value is not derived from it's parents. However, the probability of the vertex's value may be dependent on it's parents values.

updateValue

public T updateValue()

Description copied from class: Vertex

This causes a non-probabilistic vertex to recalculate it's value based off it's parent's current values.

Specified by:

updateValue in class Vertex<T>

Returns:

The updated value

getDerivedValue

public abstract T getDerivedValue()