264 lines
8.0 KiB
C++
264 lines
8.0 KiB
C++
#include "CbpSolver.h"
|
|
|
|
|
|
CbpSolver::~CbpSolver (void)
|
|
{
|
|
delete lfg_;
|
|
delete factorGraph_;
|
|
for (unsigned i = 0; i < links_.size(); i++) {
|
|
delete links_[i];
|
|
}
|
|
links_.clear();
|
|
}
|
|
|
|
|
|
|
|
ParamSet
|
|
CbpSolver::getPosterioriOf (VarId vid)
|
|
{
|
|
FgVarNode* var = lfg_->getEquivalentVariable (vid);
|
|
ParamSet probs;
|
|
if (var->hasEvidence()) {
|
|
probs.resize (var->nrStates(), Util::noEvidence());
|
|
probs[var->getEvidence()] = Util::withEvidence();
|
|
} else {
|
|
probs.resize (var->nrStates(), Util::multIdenty());
|
|
const SpLinkSet& links = ninf(var)->getLinks();
|
|
switch (NSPACE) {
|
|
case NumberSpace::NORMAL:
|
|
for (unsigned i = 0; i < links.size(); i++) {
|
|
CbpSolverLink* l = static_cast<CbpSolverLink*> (links[i]);
|
|
Util::multiply (probs, l->getPoweredMessage());
|
|
}
|
|
Util::normalize (probs);
|
|
break;
|
|
case NumberSpace::LOGARITHM:
|
|
for (unsigned i = 0; i < links.size(); i++) {
|
|
CbpSolverLink* l = static_cast<CbpSolverLink*> (links[i]);
|
|
Util::add (probs, l->getPoweredMessage());
|
|
}
|
|
Util::normalize (probs);
|
|
Util::fromLog (probs);
|
|
}
|
|
}
|
|
return probs;
|
|
}
|
|
|
|
|
|
|
|
ParamSet
|
|
CbpSolver::getJointDistributionOf (const VarIdSet& jointVarIds)
|
|
{
|
|
unsigned msgSize = 1;
|
|
vector<unsigned> dsizes (jointVarIds.size());
|
|
for (unsigned i = 0; i < jointVarIds.size(); i++) {
|
|
dsizes[i] = lfg_->getEquivalentVariable (jointVarIds[i])->nrStates();
|
|
msgSize *= dsizes[i];
|
|
}
|
|
unsigned reps = 1;
|
|
ParamSet jointDist (msgSize, Util::multIdenty());
|
|
for (int i = jointVarIds.size() - 1 ; i >= 0; i--) {
|
|
Util::multiply (jointDist, getPosterioriOf (jointVarIds[i]), reps);
|
|
reps *= dsizes[i];
|
|
}
|
|
return jointDist;
|
|
}
|
|
|
|
|
|
|
|
void
|
|
CbpSolver::initializeSolver (void)
|
|
{
|
|
unsigned nGroundVars, nGroundFacs, nWithoutNeighs;
|
|
if (COLLECT_STATISTICS) {
|
|
nGroundVars = factorGraph_->getVarNodes().size();
|
|
nGroundFacs = factorGraph_->getFactorNodes().size();
|
|
const FgVarSet& vars = factorGraph_->getVarNodes();
|
|
nWithoutNeighs = 0;
|
|
for (unsigned i = 0; i < vars.size(); i++) {
|
|
const FgFacSet& factors = vars[i]->neighbors();
|
|
if (factors.size() == 1 && factors[0]->neighbors().size() == 1) {
|
|
nWithoutNeighs ++;
|
|
}
|
|
}
|
|
}
|
|
|
|
lfg_ = new CFactorGraph (*factorGraph_);
|
|
|
|
// cout << "Uncompressed Factor Graph" << endl;
|
|
// factorGraph_->printGraphicalModel();
|
|
// factorGraph_->exportToGraphViz ("uncompressed_fg.dot");
|
|
factorGraph_ = lfg_->getCompressedFactorGraph();
|
|
|
|
if (COLLECT_STATISTICS) {
|
|
unsigned nClusterVars = factorGraph_->getVarNodes().size();
|
|
unsigned nClusterFacs = factorGraph_->getFactorNodes().size();
|
|
Statistics::updateCompressingStatistics (nGroundVars, nGroundFacs,
|
|
nClusterVars, nClusterFacs,
|
|
nWithoutNeighs);
|
|
}
|
|
|
|
// cout << "Compressed Factor Graph" << endl;
|
|
// factorGraph_->printGraphicalModel();
|
|
// factorGraph_->exportToGraphViz ("compressed_fg.dot");
|
|
// abort();
|
|
FgBpSolver::initializeSolver();
|
|
}
|
|
|
|
|
|
|
|
void
|
|
CbpSolver::createLinks (void)
|
|
{
|
|
const FacClusterSet fcs = lfg_->getFacClusters();
|
|
for (unsigned i = 0; i < fcs.size(); i++) {
|
|
const VarClusterSet vcs = fcs[i]->getVarClusters();
|
|
for (unsigned j = 0; j < vcs.size(); j++) {
|
|
unsigned c = lfg_->getGroundEdgeCount (fcs[i], vcs[j]);
|
|
links_.push_back (new CbpSolverLink (fcs[i]->getRepresentativeFactor(),
|
|
vcs[j]->getRepresentativeVariable(), c));
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
|
|
|
|
void
|
|
CbpSolver::maxResidualSchedule (void)
|
|
{
|
|
if (nIters_ == 1) {
|
|
for (unsigned i = 0; i < links_.size(); i++) {
|
|
calculateMessage (links_[i]);
|
|
SortedOrder::iterator it = sortedOrder_.insert (links_[i]);
|
|
linkMap_.insert (make_pair (links_[i], it));
|
|
if (DL >= 2 && DL < 5) {
|
|
cout << "calculating " << links_[i]->toString() << endl;
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
for (unsigned c = 0; c < links_.size(); c++) {
|
|
if (DL >= 2) {
|
|
cout << endl << "current residuals:" << endl;
|
|
for (SortedOrder::iterator it = sortedOrder_.begin();
|
|
it != sortedOrder_.end(); it ++) {
|
|
cout << " " << setw (30) << left << (*it)->toString();
|
|
cout << "residual = " << (*it)->getResidual() << endl;
|
|
}
|
|
}
|
|
|
|
SortedOrder::iterator it = sortedOrder_.begin();
|
|
SpLink* link = *it;
|
|
if (DL >= 2) {
|
|
cout << "updating " << (*sortedOrder_.begin())->toString() << endl;
|
|
}
|
|
if (link->getResidual() < BpOptions::accuracy) {
|
|
return;
|
|
}
|
|
link->updateMessage();
|
|
link->clearResidual();
|
|
sortedOrder_.erase (it);
|
|
linkMap_.find (link)->second = sortedOrder_.insert (link);
|
|
|
|
// update the messages that depend on message source --> destin
|
|
const FgFacSet& factorNeighbors = link->getVariable()->neighbors();
|
|
for (unsigned i = 0; i < factorNeighbors.size(); i++) {
|
|
const SpLinkSet& links = ninf(factorNeighbors[i])->getLinks();
|
|
for (unsigned j = 0; j < links.size(); j++) {
|
|
if (links[j]->getVariable() != link->getVariable()) {
|
|
if (DL >= 2 && DL < 5) {
|
|
cout << " calculating " << links[j]->toString() << endl;
|
|
}
|
|
calculateMessage (links[j]);
|
|
SpLinkMap::iterator iter = linkMap_.find (links[j]);
|
|
sortedOrder_.erase (iter->second);
|
|
iter->second = sortedOrder_.insert (links[j]);
|
|
}
|
|
}
|
|
}
|
|
// in counting bp, the message that a variable X sends to
|
|
// to a factor F depends on the message that F sent to the X
|
|
const SpLinkSet& links = ninf(link->getFactor())->getLinks();
|
|
for (unsigned i = 0; i < links.size(); i++) {
|
|
if (links[i]->getVariable() != link->getVariable()) {
|
|
if (DL >= 2 && DL < 5) {
|
|
cout << " calculating " << links[i]->toString() << endl;
|
|
}
|
|
calculateMessage (links[i]);
|
|
SpLinkMap::iterator iter = linkMap_.find (links[i]);
|
|
sortedOrder_.erase (iter->second);
|
|
iter->second = sortedOrder_.insert (links[i]);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
ParamSet
|
|
CbpSolver::getVar2FactorMsg (const SpLink* link) const
|
|
{
|
|
ParamSet msg;
|
|
const FgVarNode* src = link->getVariable();
|
|
const FgFacNode* dst = link->getFactor();
|
|
const CbpSolverLink* l = static_cast<const CbpSolverLink*> (link);
|
|
if (src->hasEvidence()) {
|
|
msg.resize (src->nrStates(), Util::noEvidence());
|
|
double value = link->getMessage()[src->getEvidence()];
|
|
msg[src->getEvidence()] = Util::pow (value, l->getNumberOfEdges() - 1);
|
|
} else {
|
|
msg = link->getMessage();
|
|
Util::pow (msg, l->getNumberOfEdges() - 1);
|
|
}
|
|
if (DL >= 5) {
|
|
cout << " " << "init: " << Util::parametersToString (msg) << endl;
|
|
}
|
|
const SpLinkSet& links = ninf(src)->getLinks();
|
|
switch (NSPACE) {
|
|
case NumberSpace::NORMAL:
|
|
for (unsigned i = 0; i < links.size(); i++) {
|
|
if (links[i]->getFactor() != dst) {
|
|
CbpSolverLink* l = static_cast<CbpSolverLink*> (links[i]);
|
|
Util::multiply (msg, l->getPoweredMessage());
|
|
if (DL >= 5) {
|
|
cout << " msg from " << l->getFactor()->getLabel() << ": " ;
|
|
cout << Util::parametersToString (l->getPoweredMessage()) << endl;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case NumberSpace::LOGARITHM:
|
|
for (unsigned i = 0; i < links.size(); i++) {
|
|
if (links[i]->getFactor() != dst) {
|
|
CbpSolverLink* l = static_cast<CbpSolverLink*> (links[i]);
|
|
Util::add (msg, l->getPoweredMessage());
|
|
}
|
|
}
|
|
}
|
|
if (DL >= 5) {
|
|
cout << " result = " << Util::parametersToString (msg) << endl;
|
|
}
|
|
return msg;
|
|
}
|
|
|
|
|
|
|
|
void
|
|
CbpSolver::printLinkInformation (void) const
|
|
{
|
|
for (unsigned i = 0; i < links_.size(); i++) {
|
|
CbpSolverLink* l = static_cast<CbpSolverLink*> (links_[i]);
|
|
cout << l->toString() << ":" << endl;
|
|
cout << " curr msg = " ;
|
|
cout << Util::parametersToString (l->getMessage()) << endl;
|
|
cout << " next msg = " ;
|
|
cout << Util::parametersToString (l->getNextMessage()) << endl;
|
|
cout << " powered = " ;
|
|
cout << Util::parametersToString (l->getPoweredMessage()) << endl;
|
|
cout << " residual = " << l->getResidual() << endl;
|
|
}
|
|
}
|
|
|