/*!
* \brief Apply the initialization operation on the deme.
* \param ioDeme Current deme of individuals to initialize.
* \param ioContext Context of the evolution.
*/
void InitializationOp::operate(Deme& ioDeme, Context& ioContext)
{
Beagle_StackTraceBeginM();
#ifndef BEAGLE_NDEBUG
if(ioContext.getVivariumHandle()!=NULL) {
Beagle_AssertM(mPopSize->size() == ioContext.getVivarium().size());
}
#endif // BEAGLE_NDEBUG
Beagle_LogTraceM(
ioContext.getSystem().getLogger(),
std::string("Initializing the ")+
uint2ordinal(ioContext.getDemeIndex()+1)+" deme"
);
if(!ioDeme.empty()) {
Beagle_LogBasicM(
ioContext.getSystem().getLogger(),
std::string("Warning! Applying '")+getName()+"' will overwrite the "+
uint2str(ioDeme.size())+" individual(s) currently in the deme with newly initialized "+
"individuals. If this is not what you desire consider using OversizeOp instead."
);
}
Beagle_LogTraceM(
ioContext.getSystem().getLogger(),
std::string("Resizing the deme from ")+
uint2str(ioDeme.size())+" to "+
uint2str((*mPopSize)[ioContext.getDemeIndex()])+" individuals"
);
const Factory& lFactory = ioContext.getSystem().getFactory();
Individual::Alloc::Handle lIndividualAlloc =
castHandleT<Individual::Alloc>(lFactory.getConceptAllocator("Individual"));
ioDeme.clear();
const unsigned int lDemeSize = (*mPopSize)[ioContext.getDemeIndex()];
for(unsigned int i=0; i<lDemeSize; ++i) {
ioDeme.push_back(lIndividualAlloc->allocate());
}
unsigned int lSeededIndividuals = 0;
if(mSeedsFile->getWrappedValue().empty() == false) {
Beagle_LogInfoM(
ioContext.getSystem().getLogger(),
std::string("Reading seeds file '")+mSeedsFile->getWrappedValue()+
std::string("' to initialize the ")+uint2ordinal(ioContext.getDemeIndex()+1)+
std::string(" deme")
);
lSeededIndividuals = readSeeds(mSeedsFile->getWrappedValue(), ioDeme, ioContext);
Beagle_LogDetailedM(
ioContext.getSystem().getLogger(),
uint2str(lSeededIndividuals)+std::string(" individuals read to seed the deme")
);
}
History::Handle lHistory = castHandleT<History>(ioContext.getSystem().haveComponent("History"));
Individual::Handle lOldIndividualHandle = ioContext.getIndividualHandle();
unsigned int lOldIndividualIndex = ioContext.getIndividualIndex();
for(unsigned int i=lSeededIndividuals; i<ioDeme.size(); ++i) {
Beagle_LogVerboseM(
ioContext.getSystem().getLogger(),
std::string("Initializing the ")+uint2ordinal(i+1)+" individual"
);
ioContext.setIndividualHandle(ioDeme[i]);
ioContext.setIndividualIndex(i);
initIndividual(*ioDeme[i], ioContext);
if(ioDeme[i]->getFitness() != NULL) {
ioDeme[i]->getFitness()->setInvalid();
}
if(lHistory != NULL) {
lHistory->incrementHistoryVar(*ioDeme[i]);
lHistory->trace(ioContext, std::vector<HistoryID>(), ioDeme[i], getName(), "initialization");
}
}
ioContext.setIndividualIndex(lOldIndividualIndex);
ioContext.setIndividualHandle(lOldIndividualHandle);
Beagle_StackTraceEndM();
}
/*!
* \brief Apply the decimation operation on the deme.
* \param ioDeme Current deme of individuals to decimate.
* \param ioContext Context of the evolution.
*/
void DecimateOp::operate(Deme& ioDeme, Context& ioContext)
{
Beagle_StackTraceBeginM();
Beagle_ValidateParameterM((mDecimationRatio->getWrappedValue()<=1.0),
mDecimationRatioName,
"The decimation ratio must be less than or equal to 1.0.");
Beagle_LogTraceM(
ioContext.getSystem().getLogger(),
"decimation", "Beagle::DecimateOp",
std::string("Applying decimation operation on the ")+
uint2ordinal(ioContext.getDemeIndex()+1)+" deme"
);
// Calculate the number of individuals to keep from the deme
unsigned int lMu = 0;
if(mDecimationRatio->getWrappedValue() == -1.0) {
Beagle_AssertM(ioContext.getDemeIndex() < mPopSize->size());
lMu = (*mPopSize)[ioContext.getDemeIndex()];
} else {
lMu = (unsigned int)std::ceil(mDecimationRatio->getWrappedValue()*float(ioDeme.size()));
Beagle_AssertM(ioContext.getDemeIndex() < mPopSize->size());
int lDiffSize = (*mPopSize)[ioContext.getDemeIndex()] - lMu;
if((lDiffSize >= -1) && (lDiffSize <= 1)) lMu = (*mPopSize)[ioContext.getDemeIndex()];
}
Beagle_LogTraceM(
ioContext.getSystem().getLogger(),
"decimation", "Beagle::DecimateOp",
std::string("Keeping ")+uint2str(lMu)+" of the "+uint2str(ioDeme.size())+
" individuals from the "+uint2ordinal(ioContext.getDemeIndex()+1)+" deme"
);
// Check that the number of individuals to keep (mu) isn't greater than the deme size
if(lMu > ioDeme.size()) {
std::ostringstream lOSS;
lOSS << "Warning: the actual population size (" << ioDeme.size();
lOSS << ") is less than the desired decimation size (" << lMu;
lOSS << "). Decimation is thus not applied.";
Beagle_LogBasicM(
ioContext.getSystem().getLogger(),
"decimation", "Beagle::DecimateOp",
lOSS.str()
);
return;
}
// Copy the individuals to be kept into the deme
std::make_heap(ioDeme.begin(), ioDeme.end(), IsLessPointerPredicate());
Individual::Bag lSurvivors;
for(unsigned int i=0; i<lMu; ++i) {
lSurvivors.push_back(ioDeme.front());
std::pop_heap(ioDeme.begin(), (ioDeme.end()-i), IsLessPointerPredicate());
}
ioDeme.clear();
ioDeme.insert(ioDeme.begin(), lSurvivors.begin(), lSurvivors.end());
Beagle_LogDetailedM(
ioContext.getSystem().getLogger(),
"decimation", "Beagle::DecimateOp",
std::string("There are now ")+uint2str(ioDeme.size())+" individuals in the "+
uint2ordinal(ioContext.getDemeIndex()+1)+" deme"
);
Beagle_StackTraceEndM("void DecimateOp::operate(Deme& ioDeme, Context& ioContext)");
}
/*!
* \brief Generate children from the breeder tree.
* \param ioDeme Deme to generate children from.
* \param ioContext Evolutionary context.
* \param lNbChildren Number of children to generate.
* \param inN Dimensionality of the problem.
* \param ioCMAValues CMA values to use to generate new individual.
* \param inSelectionWeights Selection weights used to generate children.
*/
void CMA::MuWCommaLambdaCMAFltVecOp::generateChildren(Deme& ioDeme,
Context& ioContext,
unsigned int inNbChildren,
unsigned int inN,
CMAValues& ioCMAValues,
const Vector& inSelectionWeights) const
{
Beagle_StackTraceBeginM();
// Check parameters and log some information
Beagle_NonNullPointerAssertM(mElitismKeepSize);
Beagle_ValidateParameterM(mLMRatio->getWrappedValue() >= 1.0,
mLMRatioName,
"The LM ratio must be higher or equal to 1.0.");
Beagle_ValidateParameterM(mElitismKeepSize->getWrappedValue() <= ioDeme.size(),
"ec.elite.keepsize",
"The elistism keepsize must be less than the deme size!");
Beagle_LogTraceM(
ioContext.getSystem().getLogger(),
std::string("Using CMA-ES (mu_w,lambda) replacement strategy to process the ")+
uint2ordinal(ioContext.getDemeIndex()+1)+" deme"
);
Beagle_LogTraceM(ioContext.getSystem().getLogger(), (*this));
const Factory& lFactory = ioContext.getSystem().getFactory();
// Create weighted mean individual.
std::sort(ioDeme.begin(), ioDeme.end(), IsMorePointerPredicate());
Individual::Alloc::Handle lIndividualAlloc =
castHandleT<Individual::Alloc>(lFactory.getConceptAllocator("Individual"));
Individual::Handle lMeanInd = castHandleT<Individual>(lIndividualAlloc->allocate());
Genotype::Alloc::Handle lGenotypeAlloc =
castHandleT<Genotype::Alloc>(lFactory.getConceptAllocator("Genotype"));
FltVec::FloatVector::Handle lMeanFloatVec =
castHandleT<FltVec::FloatVector>(lGenotypeAlloc->allocate());
lMeanFloatVec->resize(inN);
lMeanInd->push_back(lMeanFloatVec);
for(unsigned int i=0; i<inN; ++i) (*lMeanFloatVec)[i] = 0.0;
if(ioDeme.size()==1) {
Beagle_AssertM(ioDeme[0]->size() == 1);
FltVec::FloatVector::Handle lInd = castHandleT<FltVec::FloatVector>((*ioDeme[0])[0]);
(*lMeanFloatVec) = *lInd;
} else {
for(unsigned int i=0; i<ioDeme.size(); ++i) {
Beagle_AssertM(ioDeme[i]->size()==1);
FltVec::FloatVector::Handle lVecI = castHandleT<FltVec::FloatVector>((*ioDeme[i])[0]);
Beagle_AssertM(lVecI->size()==inN);
for(unsigned int j=0; j<inN; ++j) (*lMeanFloatVec)[j] += (inSelectionWeights[i] * (*lVecI)[j]);
}
}
ioCMAValues.mXmean.resize(inN);
for(unsigned int i=0; i<inN; ++i) ioCMAValues.mXmean[i] = (*lMeanFloatVec)[i];
// Generate lambda children with breeder tree, first build breeder roulette
RouletteT<unsigned int> lRoulette;
buildRoulette(lRoulette, ioContext);
// Keep best individuals if elitism is used
const unsigned int lElitismKS=mElitismKeepSize->getWrappedValue();
if(lElitismKS > 0) {
Individual::Bag lBestInd;
History::Handle lHistory = castHandleT<History>(ioContext.getSystem().haveComponent("History"));
std::make_heap(ioDeme.begin(), ioDeme.end(), IsLessPointerPredicate());
for(unsigned int i=0; i<lElitismKS; ++i) {
if(lHistory != NULL) {
HistoryID::Handle lHID = castHandleT<HistoryID>(ioDeme[0]->getMember("HistoryID"));
std::vector<HistoryID> lParent;
if(lHID != NULL) lParent.push_back(*lHID);
lHistory->allocateNewID(*ioDeme[0]);
lHistory->trace(ioContext, lParent, ioDeme[0], getName(), "elitism");
}
lBestInd.push_back(ioDeme[0]);
std::pop_heap(ioDeme.begin(), ioDeme.end(), IsLessPointerPredicate());
ioDeme.pop_back();
}
ioDeme.clear();
ioDeme.insert(ioDeme.end(), lBestInd.begin(), lBestInd.end());
} else ioDeme.clear();
// Generate the children
Individual::Bag lBagWithMeanInd;
lBagWithMeanInd.push_back(lMeanInd);
for(unsigned int i=0; i<inNbChildren; ++i) {
unsigned int lIndexBreeder = lRoulette.select(ioContext.getSystem().getRandomizer());
BreederNode::Handle lSelectedBreeder=getRootNode();
for(unsigned int j=0; j<lIndexBreeder; ++j)
lSelectedBreeder=lSelectedBreeder->getNextSibling();
Beagle_NonNullPointerAssertM(lSelectedBreeder);
Beagle_NonNullPointerAssertM(lSelectedBreeder->getBreederOp());
Individual::Handle lBredIndiv =
lSelectedBreeder->getBreederOp()->breed(lBagWithMeanInd,
lSelectedBreeder->getFirstChild(),
ioContext);
Beagle_NonNullPointerAssertM(lBredIndiv);
ioDeme.push_back(lBredIndiv);
}
Beagle_StackTraceEndM();
}