267 lines
7.9 KiB
C++
267 lines
7.9 KiB
C++
#include "CbpSolver.h"
|
|
|
|
|
|
CbpSolver::CbpSolver (const FactorGraph& fg) : BpSolver (fg)
|
|
{
|
|
unsigned nGroundVars, nGroundFacs, nWithoutNeighs;
|
|
if (Constants::COLLECT_STATS) {
|
|
nGroundVars = fg_->varNodes().size();
|
|
nGroundFacs = fg_->facNodes().size();
|
|
const VarNodes& vars = fg_->varNodes();
|
|
nWithoutNeighs = 0;
|
|
for (unsigned i = 0; i < vars.size(); i++) {
|
|
const FacNodes& factors = vars[i]->neighbors();
|
|
if (factors.size() == 1 && factors[0]->neighbors().size() == 1) {
|
|
nWithoutNeighs ++;
|
|
}
|
|
}
|
|
}
|
|
cfg_ = new CFactorGraph (fg);
|
|
fg_ = cfg_->getGroundFactorGraph();
|
|
if (Constants::COLLECT_STATS) {
|
|
unsigned nClusterVars = fg_->varNodes().size();
|
|
unsigned nClusterFacs = fg_->facNodes().size();
|
|
Statistics::updateCompressingStatistics (nGroundVars,
|
|
nGroundFacs, nClusterVars, nClusterFacs, nWithoutNeighs);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
CbpSolver::~CbpSolver (void)
|
|
{
|
|
delete cfg_;
|
|
delete fg_;
|
|
for (unsigned i = 0; i < links_.size(); i++) {
|
|
delete links_[i];
|
|
}
|
|
links_.clear();
|
|
}
|
|
|
|
|
|
|
|
void
|
|
CbpSolver::printSolverFlags (void) const
|
|
{
|
|
stringstream ss;
|
|
ss << "counting bp [" ;
|
|
ss << "schedule=" ;
|
|
typedef BpOptions::Schedule Sch;
|
|
switch (BpOptions::schedule) {
|
|
case Sch::SEQ_FIXED: ss << "seq_fixed"; break;
|
|
case Sch::SEQ_RANDOM: ss << "seq_random"; break;
|
|
case Sch::PARALLEL: ss << "parallel"; break;
|
|
case Sch::MAX_RESIDUAL: ss << "max_residual"; break;
|
|
}
|
|
ss << ",max_iter=" << BpOptions::maxIter;
|
|
ss << ",accuracy=" << BpOptions::accuracy;
|
|
ss << ",log_domain=" << Util::toString (Globals::logDomain);
|
|
ss << ",order_vars=" << Util::toString (FactorGraph::orderVariables);
|
|
ss << ",chkif=" <<
|
|
Util::toString (CFactorGraph::checkForIdenticalFactors);
|
|
ss << "]" ;
|
|
cout << ss.str() << endl;
|
|
}
|
|
|
|
|
|
|
|
|
|
Params
|
|
CbpSolver::getPosterioriOf (VarId vid)
|
|
{
|
|
if (runned_ == false) {
|
|
runSolver();
|
|
}
|
|
assert (cfg_->getEquivalentVariable (vid));
|
|
VarNode* var = cfg_->getEquivalentVariable (vid);
|
|
Params probs;
|
|
if (var->hasEvidence()) {
|
|
probs.resize (var->range(), LogAware::noEvidence());
|
|
probs[var->getEvidence()] = LogAware::withEvidence();
|
|
} else {
|
|
probs.resize (var->range(), LogAware::multIdenty());
|
|
const SpLinkSet& links = ninf(var)->getLinks();
|
|
if (Globals::logDomain) {
|
|
for (unsigned i = 0; i < links.size(); i++) {
|
|
CbpSolverLink* l = static_cast<CbpSolverLink*> (links[i]);
|
|
Util::add (probs, l->poweredMessage());
|
|
}
|
|
LogAware::normalize (probs);
|
|
Util::fromLog (probs);
|
|
} else {
|
|
for (unsigned i = 0; i < links.size(); i++) {
|
|
CbpSolverLink* l = static_cast<CbpSolverLink*> (links[i]);
|
|
Util::multiply (probs, l->poweredMessage());
|
|
}
|
|
LogAware::normalize (probs);
|
|
}
|
|
}
|
|
return probs;
|
|
}
|
|
|
|
|
|
|
|
Params
|
|
CbpSolver::getJointDistributionOf (const VarIds& jointVids)
|
|
{
|
|
VarIds eqVarIds;
|
|
for (unsigned i = 0; i < jointVids.size(); i++) {
|
|
VarNode* vn = cfg_->getEquivalentVariable (jointVids[i]);
|
|
eqVarIds.push_back (vn->varId());
|
|
}
|
|
return BpSolver::getJointDistributionOf (eqVarIds);
|
|
}
|
|
|
|
|
|
|
|
void
|
|
CbpSolver::createLinks (void)
|
|
{
|
|
const FacClusters& fcs = cfg_->getFacClusters();
|
|
for (unsigned i = 0; i < fcs.size(); i++) {
|
|
const VarClusters& vcs = fcs[i]->getVarClusters();
|
|
for (unsigned j = 0; j < vcs.size(); j++) {
|
|
unsigned c = cfg_->getEdgeCount (fcs[i], vcs[j]);
|
|
links_.push_back (new CbpSolverLink (
|
|
fcs[i]->getRepresentativeFactor(),
|
|
vcs[j]->getRepresentativeVariable(), c));
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
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 (Constants::DEBUG >= 2 && Constants::DEBUG < 5) {
|
|
cout << "calculating " << links_[i]->toString() << endl;
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
for (unsigned c = 0; c < links_.size(); c++) {
|
|
if (Constants::DEBUG >= 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 (Constants::DEBUG >= 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 FacNodes& 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 (Constants::DEBUG >= 2 && Constants::DEBUG < 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 (Constants::DEBUG >= 2 && Constants::DEBUG < 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]);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
Params
|
|
CbpSolver::getVar2FactorMsg (const SpLink* link) const
|
|
{
|
|
Params msg;
|
|
const VarNode* src = link->getVariable();
|
|
const FacNode* dst = link->getFactor();
|
|
const CbpSolverLink* l = static_cast<const CbpSolverLink*> (link);
|
|
if (src->hasEvidence()) {
|
|
msg.resize (src->range(), LogAware::noEvidence());
|
|
double value = link->getMessage()[src->getEvidence()];
|
|
msg[src->getEvidence()] = LogAware::pow (value, l->nrEdges() - 1);
|
|
} else {
|
|
msg = link->getMessage();
|
|
LogAware::pow (msg, l->nrEdges() - 1);
|
|
}
|
|
if (Constants::DEBUG >= 5) {
|
|
cout << " " << "init: " << msg << endl;
|
|
}
|
|
const SpLinkSet& links = ninf(src)->getLinks();
|
|
if (Globals::logDomain) {
|
|
for (unsigned i = 0; i < links.size(); i++) {
|
|
if (links[i]->getFactor() != dst) {
|
|
CbpSolverLink* l = static_cast<CbpSolverLink*> (links[i]);
|
|
Util::add (msg, l->poweredMessage());
|
|
}
|
|
}
|
|
} else {
|
|
for (unsigned i = 0; i < links.size(); i++) {
|
|
if (links[i]->getFactor() != dst) {
|
|
CbpSolverLink* l = static_cast<CbpSolverLink*> (links[i]);
|
|
Util::multiply (msg, l->poweredMessage());
|
|
if (Constants::DEBUG >= 5) {
|
|
cout << " msg from " << l->getFactor()->getLabel() << ": " ;
|
|
cout << l->poweredMessage() << endl;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (Constants::DEBUG >= 5) {
|
|
cout << " result = " << 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 = " << l->getMessage() << endl;
|
|
cout << " next msg = " << l->getNextMessage() << endl;
|
|
cout << " powered = " << l->poweredMessage() << endl;
|
|
cout << " residual = " << l->getResidual() << endl;
|
|
}
|
|
}
|
|
|