hak.h

Go to the documentation of this file.

/*  This file is part of libDAI - http://www.libdai.org/
 *
 *  Copyright (c) 2006-2011, The libDAI authors. All rights reserved.
 *
 *  Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
 */




#include <dai/dai_config.h>
#ifdef DAI_WITH_HAK


#ifndef __defined_libdai_hak_h
#define __defined_libdai_hak_h


#include <string>
#include <dai/daialg.h>
#include <dai/regiongraph.h>
#include <dai/enum.h>
#include <dai/properties.h>


namespace dai {


class HAK : public DAIAlgRG {
    private:
        std::vector<Factor>                _Qa;
        std::vector<Factor>                _Qb;
        std::vector<std::vector<Factor> >  _muab;
        std::vector<std::vector<Factor> >  _muba;
        Real _maxdiff;
        size_t _iters;

    public:
        struct Properties {

            DAI_ENUM(ClustersType,MIN,BETHE,DELTA,LOOP);

            DAI_ENUM(InitType,UNIFORM,RANDOM);

            size_t verbose;

            size_t maxiter;

            double maxtime;

            Real tol;

            Real damping;

            ClustersType clusters;

            InitType init;

            bool doubleloop;

            size_t loopdepth;
        } props;

    public:

        HAK() : DAIAlgRG(), _Qa(), _Qb(), _muab(), _muba(), _maxdiff(0.0), _iters(0U), props() {}


        HAK( const FactorGraph &fg, const PropertySet &opts );

        HAK( const RegionGraph &rg, const PropertySet &opts );



        virtual HAK* clone() const { return new HAK(*this); }
        virtual HAK* construct( const FactorGraph &fg, const PropertySet &opts ) const { return new HAK( fg, opts ); }
        virtual std::string name() const { return "HAK"; }
        virtual Factor belief( const VarSet &vs ) const;
        virtual std::vector<Factor> beliefs() const;
        virtual Real logZ() const;
        virtual void init();
        virtual void init( const VarSet &vs );
        virtual Real run();
        virtual Real maxDiff() const { return _maxdiff; }
        virtual size_t Iterations() const { return _iters; }
        virtual void setMaxIter( size_t maxiter ) { props.maxiter = maxiter; }
        virtual void setProperties( const PropertySet &opts );
        virtual PropertySet getProperties() const;
        virtual std::string printProperties() const;



        Factor & muab( size_t alpha, size_t _beta ) { return _muab[alpha][_beta]; }
        Factor & muba( size_t alpha, size_t _beta ) { return _muba[alpha][_beta]; }
        const Factor& Qa( size_t alpha ) const { return _Qa[alpha]; };
        const Factor& Qb( size_t beta ) const { return _Qb[beta]; };

        Real doGBP();
        Real doDoubleLoop();

    private:
        void construct();

        void findLoopClusters( const FactorGraph &fg, std::set<VarSet> &allcl, VarSet newcl, const Var & root, size_t length, VarSet vars );
};


} // end of namespace dai


#endif


#endif