-/* Copyright (C) 2006-2008 Joris Mooij [j dot mooij at science dot ru dot nl]
- Radboud University Nijmegen, The Netherlands
-
+/* Copyright (C) 2006-2008 Joris Mooij [joris dot mooij at tuebingen dot mpg dot de]
+ Radboud University Nijmegen, The Netherlands /
+ Max Planck Institute for Biological Cybernetics, Germany
+
This file is part of libDAI.
libDAI is free software; you can redistribute it and/or modify
#include <map>
#include <set>
#include <dai/lc.h>
-#include <dai/diffs.h>
#include <dai/util.h>
#include <dai/alldai.h>
-#include <dai/x2x.h>
namespace dai {
assert( opts.hasKey("verbose") );
assert( opts.hasKey("cavity") );
assert( opts.hasKey("updates") );
-
+
props.tol = opts.getStringAs<double>("tol");
props.maxiter = opts.getStringAs<size_t>("maxiter");
props.verbose = opts.getStringAs<size_t>("verbose");
props.cavaiopts = opts.getStringAs<PropertySet>("cavaiopts");
if( opts.hasKey("reinit") )
props.reinit = opts.getStringAs<bool>("reinit");
+ if( opts.hasKey("damping") )
+ props.damping = opts.getStringAs<double>("damping");
+ else
+ props.damping = 0.0;
}
opts.Set( "cavainame", props.cavainame );
opts.Set( "cavaiopts", props.cavaiopts );
opts.Set( "reinit", props.reinit );
+ opts.Set( "damping", props.damping );
return opts;
}
s << "updates=" << props.updates << ",";
s << "cavainame=" << props.cavainame << ",";
s << "cavaiopts=" << props.cavaiopts << ",";
- s << "reinit=" << props.reinit << "]";
+ s << "reinit=" << props.reinit << ",";
+ s << "damping=" << props.damping << "]";
return s.str();
}
-LC::LC( const FactorGraph & fg, const PropertySet &opts ) : DAIAlgFG(fg), _pancakes(), _cavitydists(), _phis(), _beliefs(), props(), maxdiff(0.0) {
+LC::LC( const FactorGraph & fg, const PropertySet &opts ) : DAIAlgFG(fg), _pancakes(), _cavitydists(), _phis(), _beliefs(), _maxdiff(0.0), _iters(0), props() {
setProperties( opts );
// create pancakes
- _pancakes.resize(nrVars());
-
+ _pancakes.resize( nrVars() );
+
// create cavitydists
for( size_t i=0; i < nrVars(); i++ )
- _cavitydists.push_back(Factor(delta(i)));
+ _cavitydists.push_back(Factor( delta(i) ));
// create phis
_phis.reserve( nrVars() );
}
// create beliefs
+ _beliefs.reserve( nrVars() );
for( size_t i=0; i < nrVars(); i++ )
_beliefs.push_back(Factor(var(i)));
}
-string LC::identify() const {
+string LC::identify() const {
return string(Name) + printProperties();
}
double maxdiff = 0;
if( props.verbose >= 2 )
- cout << "Initing cavity " << var(i) << "(" << delta(i).size() << " vars, " << delta(i).states() << " states)" << endl;
+ cerr << "Initing cavity " << var(i) << "(" << delta(i).size() << " vars, " << delta(i).nrStates() << " states)" << endl;
if( props.cavity == Properties::CavityType::UNIFORM )
Bi = Factor(delta(i));
double tic = toc();
if( props.verbose >= 1 ) {
- cout << "LC::InitCavityDists: ";
+ cerr << Name << "::InitCavityDists: ";
if( props.cavity == Properties::CavityType::UNIFORM )
- cout << "Using uniform initial cavity distributions" << endl;
+ cerr << "Using uniform initial cavity distributions" << endl;
else if( props.cavity == Properties::CavityType::FULL )
- cout << "Using full " << name << opts << "...";
+ cerr << "Using full " << name << opts << "...";
else if( props.cavity == Properties::CavityType::PAIR )
- cout << "Using pairwise " << name << opts << "...";
+ cerr << "Using pairwise " << name << opts << "...";
else if( props.cavity == Properties::CavityType::PAIR2 )
- cout << "Using pairwise(new) " << name << opts << "...";
+ cerr << "Using pairwise(new) " << name << opts << "...";
}
double maxdiff = 0.0;
if( md > maxdiff )
maxdiff = md;
}
- init();
if( props.verbose >= 1 ) {
- cout << "used " << toc() - tic << " clocks." << endl;
+ cerr << Name << "::InitCavityDists used " << toc() - tic << " seconds." << endl;
}
return maxdiff;
long LC::SetCavityDists( std::vector<Factor> &Q ) {
- if( props.verbose >= 1 )
- cout << "LC::SetCavityDists: Setting initial cavity distributions" << endl;
+ if( props.verbose >= 1 )
+ cerr << Name << "::SetCavityDists: Setting initial cavity distributions" << endl;
if( Q.size() != nrVars() )
return -1;
for( size_t i = 0; i < nrVars(); i++ ) {
} else
_cavitydists[i] = Q[i];
}
- init();
return 0;
}
_phis[i][I.iter].randomize();
else
_phis[i][I.iter].fill(1.0);
- for( size_t i = 0; i < nrVars(); i++ ) {
- _pancakes[i] = _cavitydists[i];
-
- foreach( const Neighbor &I, nbV(i) ) {
- _pancakes[i] *= factor(I);
- if( props.updates == Properties::UpdateType::SEQRND )
- _pancakes[i] *= _phis[i][I.iter];
- }
-
- _pancakes[i].normalize();
-
- CalcBelief(i);
- }
}
Factor A_I;
for( VarSet::const_iterator k = Ivars.begin(); k != Ivars.end(); k++ )
if( var(i) != *k )
- A_I *= (_pancakes[findVar(*k)] * factor(I).inverse()).partSum( Ivars / var(i) );
+ A_I *= (_pancakes[findVar(*k)] * factor(I).inverse()).marginal( Ivars / var(i), false );
if( Ivars.size() > 1 )
A_I ^= (1.0 / (Ivars.size() - 1));
- Factor A_Ii = (_pancakes[i] * factor(I).inverse() * _phis[i][_I].inverse()).partSum( Ivars / var(i) );
- Factor quot = A_I.divided_by(A_Ii);
+ Factor A_Ii = (_pancakes[i] * factor(I).inverse() * _phis[i][_I].inverse()).marginal( Ivars / var(i), false );
+ Factor quot = A_I / A_Ii;
+ if( props.damping != 0.0 )
+ quot = (quot^(1.0 - props.damping)) * (_phis[i][_I]^props.damping);
- piet *= quot.divided_by( _phis[i][_I] ).normalized();
+ piet *= quot / _phis[i][_I].normalized();
_phis[i][_I] = quot.normalized();
piet.normalize();
if( piet.hasNaNs() ) {
- cout << "LC::NewPancake(" << i << ", " << _I << "): has NaNs!" << endl;
+ cerr << Name << "::NewPancake(" << i << ", " << _I << "): has NaNs!" << endl;
hasNaNs = true;
}
double LC::run() {
if( props.verbose >= 1 )
- cout << "Starting " << identify() << "...";
+ cerr << "Starting " << identify() << "...";
if( props.verbose >= 2 )
- cout << endl;
+ cerr << endl;
double tic = toc();
Diffs diffs(nrVars(), 1.0);
double md = InitCavityDists( props.cavainame, props.cavaiopts );
- if( md > maxdiff )
- maxdiff = md;
+ if( md > _maxdiff )
+ _maxdiff = md;
+
+ for( size_t i = 0; i < nrVars(); i++ ) {
+ _pancakes[i] = _cavitydists[i];
+
+ foreach( const Neighbor &I, nbV(i) ) {
+ _pancakes[i] *= factor(I);
+ if( props.updates == Properties::UpdateType::SEQRND )
+ _pancakes[i] *= _phis[i][I.iter];
+ }
+
+ _pancakes[i].normalize();
+
+ CalcBelief(i);
+ }
vector<Factor> old_beliefs;
for(size_t i=0; i < nrVars(); i++ )
break;
}
if( hasNaNs ) {
- cout << "LC::run: initial _pancakes has NaNs!" << endl;
- return -1.0;
+ cerr << Name << "::run: initial _pancakes has NaNs!" << endl;
+ return 1.0;
}
size_t nredges = nrEdges();
foreach( const Neighbor &I, nbV(i) )
update_seq.push_back( Edge( i, I.iter ) );
- size_t iter = 0;
-
// do several passes over the network until maximum number of iterations has
// been reached or until the maximum belief difference is smaller than tolerance
- for( iter=0; iter < props.maxiter && diffs.maxDiff() > props.tol; iter++ ) {
+ for( _iters=0; _iters < props.maxiter && diffs.maxDiff() > props.tol; _iters++ ) {
// Sequential updates
if( props.updates == Properties::UpdateType::SEQRND )
random_shuffle( update_seq.begin(), update_seq.end() );
-
+
for( size_t t=0; t < nredges; t++ ) {
size_t i = update_seq[t].first;
size_t _I = update_seq[t].second;
_pancakes[i] = NewPancake( i, _I, hasNaNs);
if( hasNaNs )
- return -1.0;
+ return 1.0;
CalcBelief( i );
}
}
if( props.verbose >= 3 )
- cout << "LC::run: maxdiff " << diffs.maxDiff() << " after " << iter+1 << " passes" << endl;
+ cerr << Name << "::run: maxdiff " << diffs.maxDiff() << " after " << _iters+1 << " passes" << endl;
}
- if( diffs.maxDiff() > maxdiff )
- maxdiff = diffs.maxDiff();
+ if( diffs.maxDiff() > _maxdiff )
+ _maxdiff = diffs.maxDiff();
if( props.verbose >= 1 ) {
if( diffs.maxDiff() > props.tol ) {
if( props.verbose == 1 )
- cout << endl;
- cout << "LC::run: WARNING: not converged within " << props.maxiter << " passes (" << toc() - tic << " clocks)...final maxdiff:" << diffs.maxDiff() << endl;
+ cerr << endl;
+ cerr << Name << "::run: WARNING: not converged within " << props.maxiter << " passes (" << toc() - tic << " seconds)...final maxdiff:" << diffs.maxDiff() << endl;
} else {
if( props.verbose >= 2 )
- cout << "LC::run: ";
- cout << "converged in " << iter << " passes (" << toc() - tic << " clocks)." << endl;
+ cerr << Name << "::run: ";
+ cerr << "converged in " << _iters << " passes (" << toc() - tic << " seconds)." << endl;
}
}
projects / libdai.git / blobdiff