io.improbable.keanu.network

Class LambdaSection

java.lang.Object

io.improbable.keanu.network.LambdaSection

public class LambdaSection
extends java.lang.Object

A Lambda Section is defined as a given vertex and all the vertices that it affects (downstream) OR all of the vertices that affects it (upstream), stopping at observed or probabilistic vertices.

For example:

A = SomeDistribution(...) B = A.cos() C = SomeDistribution(B, ...) D = C.times(2)

The downstream Lambda Section of A would be [A, B, C] The upstream Lambda Section of D would be [D, C] The upstream Lambda Section of C would be [C, B, A]

Method Summary

Modifier and Type	Method and Description
static LambdaSection	getDownstreamLambdaSection(Vertex<?> aVertex, boolean includeNonProbabilistic)
static LambdaSection	getDownstreamLambdaSectionForCollection(java.util.List<Vertex> vertices, boolean includeNonProbabilistic)
static LambdaSection	getUpstreamLambdaSection(Vertex<?> aVertex, boolean includeNonProbabilistic)
static LambdaSection	getUpstreamLambdaSectionForCollection(java.util.List<Vertex> vertices, boolean includeNonProbabilistic)

Methods inherited from class java.lang.Object

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

Method Detail

getUpstreamLambdaSection

public static LambdaSection getUpstreamLambdaSection(Vertex<?> aVertex,
                                                     boolean includeNonProbabilistic)

Parameters:

aVertex - the starting vertex

includeNonProbabilistic - false if only the probabilistic or observed vertices are wanted

Returns:

All upstream vertices up to probabilistic or observed vertices if includeNonProbabilistic is true. All upstream probabilistic or observed vertices stopping at probabilistic or observed if includeNonProbabilistic is false.

getDownstreamLambdaSection

public static LambdaSection getDownstreamLambdaSection(Vertex<?> aVertex,
                                                       boolean includeNonProbabilistic)

Parameters:

aVertex - the starting vertex

includeNonProbabilistic - false if only the probabilistic and observed are wanted

Returns:

All downstream vertices up to probabilistic or observed vertices if includeNonProbabilistic is true. All downstream probabilistic or observed vertices stopping at probabilistic or observed if includeNonProbabilistic is false.

getUpstreamLambdaSectionForCollection

public static LambdaSection getUpstreamLambdaSectionForCollection(java.util.List<Vertex> vertices,
                                                                  boolean includeNonProbabilistic)

Parameters:

vertices - the starting vertices

includeNonProbabilistic - false if only the probabilistic or observed vertices are wanted

Returns:

All upstream vertices up to probabilistic or observed vertices if includeNonProbabilistic is true. All upstream probabilistic or observed vertices stopping at probabilistic or observed if includeNonProbabilistic is false.

getDownstreamLambdaSectionForCollection

public static LambdaSection getDownstreamLambdaSectionForCollection(java.util.List<Vertex> vertices,
                                                                    boolean includeNonProbabilistic)

Parameters:

vertices - the starting vertices

includeNonProbabilistic - false if only the probabilistic or observed vertices are wanted

Returns:

All upstream vertices up to probabilistic or observed vertices if includeNonProbabilistic is true. All upstream probabilistic or observed vertices stopping at probabilistic or observed if includeNonProbabilistic is false.