Arak::ColoringProposal Class Reference

#include <coloring_mcmc.hpp>

Inheritance diagram for Arak::ColoringProposal:

[legend]List of all members.

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Detailed Description

The proposal distribution of the Markov chain.

This distribution determines the convergence speed of the Markov chain, but does not affect the stationary distribution (provided it is Harris recurrent).

This implementation is analogous to an iterator interface. The sample method "advances the iterator" by generating a new move which can be accessed by the move() method.

Definition at line 76 of file coloring_mcmc.hpp.

Public Member Functions
virtual	~ColoringProposal ()
	Destructor.
virtual void	sample (const Coloring &state, Arak::Util::Random &random, bool reversible=true)=0
	Samples the proposal distribution to obtain a new move.
virtual ColoringMove &	move ()=0
	Returns a reference to the move most recently sampled from this proposal distribution.
virtual double	ll (const Coloring &c)=0
	Returns the log likelihood of the most recently sampled proposal.
virtual double	rll (const Coloring &c)=0
	Returns the log likelihood of sampling the reverse of the most recently sampled proposal.
virtual void	result (bool accepted)=0
	This method is invoked by the Markov chain to inform the proposal of the result of its most recently proposed move.

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Constructor & Destructor Documentation

virtual Arak::ColoringProposal::~ColoringProposal (   )  [inline, virtual]

Destructor. Definition at line 83 of file coloring_mcmc.hpp.

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Member Function Documentation

virtual double Arak::ColoringProposal::ll (  const Coloring &  c  )  [pure virtual]

Returns the log likelihood of the most recently sampled proposal. Returns: the log likelihood of the most recently sampled proposal Implemented in Arak::CN94Proposal, and Arak::ModifiedCN94Proposal.

virtual ColoringMove& Arak::ColoringProposal::move (   )  [pure virtual]

Returns a reference to the move most recently sampled from this proposal distribution. This move is guaranteed to be stable only until #sample(const Coloring&, Arak::Util::Random&) is called again. Returns: the most recently sampled move Implemented in Arak::CN94Proposal, and Arak::ModifiedCN94Proposal.

virtual void Arak::ColoringProposal::result (  bool  accepted  )  [pure virtual]

This method is invoked by the Markov chain to inform the proposal of the result of its most recently proposed move. Implemented in Arak::CN94Proposal.

virtual double Arak::ColoringProposal::rll (  const Coloring &  c  )  [pure virtual]

Returns the log likelihood of sampling the reverse of the most recently sampled proposal. Returns: the log likelihood of sampling the reverse of the most recently sampled proposal Implemented in Arak::CN94Proposal, and Arak::ModifiedCN94Proposal.

virtual void Arak::ColoringProposal::sample (  const Coloring &  state, Arak::Util::Random &  random, bool  reversible = true )  [pure virtual]

Samples the proposal distribution to obtain a new move. Parameters: state  the current state of the Markov chain random  a source of pseudorandomness reversible  a flag which indicates whether the sampled move be reversible (default: true) Implemented in Arak::CN94Proposal.

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

• coloring_mcmc.hpp

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