Detailed Description

Signature for a discrete conditional density, used to construct conditionals.

The format is (Key % string) for nodes with no parents, and (Key | Key, Key = string) for nodes with parents.

The string specifies a conditional probability spec in the 00 01 10 11 order. For three-valued, it would be 00 01 02 10 11 12 20 21 22, etc...

For example, given the following keys

Key A("Asia"), S("Smoking"), T("Tuberculosis"), L("LungCancer"), B("Bronchitis"), E("Either"), X("XRay"), D("Dyspnoea");

These are all valid signatures (Asia network example):

A % "99/1" S % "50/50" T|A = "99/1 95/5" L|S = "99/1 90/10" B|S = "70/30 40/60" E|T,L = "F F F 1" X|E = "95/5 2/98" D|E,B = "9/1 2/8 3/7 1/9"

Public Member Functions
	Signature (const DiscreteKey &key)
	Constructor from DiscreteKey.

const DiscreteKey &	key () const
	the variable key

const DiscreteKeys &	parents () const
	the parent keys

DiscreteKeys	discreteKeysParentsFirst () const
	All keys, with variable key last.

std::vector< Key >	indices () const
	All key indices, with variable key first.

const boost::optional< Table > &	table () const

std::vector< double >	cpt () const

Signature &	operator, (const DiscreteKey &parent)
	Add a parent.

Signature &	operator= (const std::string &spec)
	Add the CPT spec - Fails in boost 1.40.

Signature &	operator= (const Table &table)
	Add the CPT spec directly as a table.

Friends
GTSAM_EXPORT friend std::ostream &	operator<< (std::ostream &os, const Signature &s)
	provide streaming

The documentation for this class was generated from the following files:

Public Member Functions