/*!
* \brief Recombine individuals by weighted mean to generate a new individual.
* \param inIndivPool Parents being recombined.
* \param ioContext Evolutionary context.
* \return Children generated by recombination.
*/
Individual::Handle SAES::RecombinationWeightedOp::recombine(Individual::Bag& inIndivPool,
Context& ioContext)
{
Beagle_StackTraceBeginM();
// Compute recombination weights.
std::vector<double> lWeights(inIndivPool.size());
for(unsigned int i=0; i<lWeights.size(); ++i) {
lWeights[i] = std::log(double(lWeights.size()+1));
lWeights[i] -= std::log(double(i+1));
}
// Recombine parents to generate new individual.
const Factory& lFactory = ioContext.getSystem().getFactory();
Individual::Alloc::Handle lIndivAlloc =
castHandleT<Individual::Alloc>(lFactory.getConceptAllocator("Individual"));
Genotype::Alloc::Handle lGenotypeAlloc =
castHandleT<Genotype::Alloc>(lFactory.getConceptAllocator("Genotype"));
Individual::Handle lChildIndiv = castHandleT<Individual>(lIndivAlloc->allocate());
std::vector< std::vector<double> > lCountGenoSum;
for(unsigned int i=0; i<inIndivPool.size(); ++i) {
const unsigned int lPoolISize = inIndivPool[i]->size();
const unsigned int lChildSize = lChildIndiv->size();
if(lPoolISize > lChildSize) {
lCountGenoSum.resize(lPoolISize);
lChildIndiv->resize(lPoolISize);
for(unsigned int j=lChildSize; j<lPoolISize; ++j) {
(*lChildIndiv)[j] = castHandleT<Genotype>(lGenotypeAlloc->allocate());
}
}
for(unsigned int j=0; j<lPoolISize; ++j) {
SAES::PairVector::Handle lChildGenoJ = castHandleT<SAES::PairVector>((*lChildIndiv)[j]);
SAES::PairVector::Handle lPoolIGenoJ = castHandleT<SAES::PairVector>((*inIndivPool[i])[j]);
const unsigned int lPoolIGenoJSize = lPoolIGenoJ->size();
if(lPoolIGenoJSize > lChildGenoJ->size()) {
lChildGenoJ->resize(lPoolIGenoJSize,0.0);
lCountGenoSum[j].resize(lPoolIGenoJSize,0);
}
for(unsigned int k=0; k<lPoolIGenoJSize; ++k) {
(*lChildGenoJ)[k].mValue += (lWeights[i] * (*lPoolIGenoJ)[k].mValue);
(*lChildGenoJ)[k].mStrategy += (lWeights[i] * (*lPoolIGenoJ)[k].mStrategy);
lCountGenoSum[j][k] += lWeights[i];
}
}
}
for(unsigned int i=0; i<lChildIndiv->size(); ++i) {
SAES::PairVector::Handle lChildGenoI = castHandleT<SAES::PairVector>((*lChildIndiv)[i]);
for(unsigned int j=0; j<lChildGenoI->size(); ++j) {
(*lChildGenoI)[j].mValue /= lCountGenoSum[i][j];
(*lChildGenoI)[j].mStrategy /= lCountGenoSum[i][j];
}
}
Beagle_LogDebugM(ioContext.getSystem().getLogger(), *lChildIndiv);
return lChildIndiv;
Beagle_StackTraceEndM();
}
/*!
* \brief Recombine individuals by averaging to generate a new individual.
* \param inIndivPool Parents being recombined.
* \param ioContext Evolutionary context.
* \return Children generated by recombination.
*/
Individual::Handle Beagle::GA::RecombinationESVecOp::recombine(Individual::Bag& inIndivPool,
Context& ioContext)
{
Beagle_StackTraceBeginM();
// Recombine parents to generate new individual.
const Factory& lFactory = ioContext.getSystem().getFactory();
Individual::Alloc::Handle lIndivAlloc =
castHandleT<Individual::Alloc>(lFactory.getConceptAllocator("Individual"));
Genotype::Alloc::Handle lGenotypeAlloc =
castHandleT<Genotype::Alloc>(lFactory.getConceptAllocator("Genotype"));
Individual::Handle lChildIndiv = castHandleT<Individual>(lIndivAlloc->allocate());
std::vector< std::vector<unsigned int> > lCountGenoSum;
for(unsigned int i=0; i<inIndivPool.size(); ++i) {
const unsigned int lPoolISize = inIndivPool[i]->size();
const unsigned int lChildSize = lChildIndiv->size();
if(lPoolISize > lChildSize) {
lCountGenoSum.resize(lPoolISize);
lChildIndiv->resize(lPoolISize);
for(unsigned int j=lChildSize; j<lPoolISize; ++j) {
(*lChildIndiv)[j] = castHandleT<Genotype>(lGenotypeAlloc->allocate());
}
}
for(unsigned int j=0; j<lPoolISize; ++j) {
GA::ESVector::Handle lChildGenoJ = castHandleT<GA::ESVector>((*lChildIndiv)[j]);
GA::ESVector::Handle lPoolIGenoJ = castHandleT<GA::ESVector>((*inIndivPool[i])[j]);
const unsigned int lPoolIGenoJSize = lPoolIGenoJ->size();
if(lPoolIGenoJSize > lChildGenoJ->size()) {
lChildGenoJ->resize(lPoolIGenoJSize,0.0);
lCountGenoSum[j].resize(lPoolIGenoJSize,0);
}
for(unsigned int k=0; k<lPoolIGenoJSize; ++k) {
(*lChildGenoJ)[k].mValue += (*lPoolIGenoJ)[k].mValue;
(*lChildGenoJ)[k].mStrategy += (*lPoolIGenoJ)[k].mStrategy;
++lCountGenoSum[j][k];
}
}
}
for(unsigned int i=0; i<lChildIndiv->size(); ++i) {
GA::ESVector::Handle lChildGenoI = castHandleT<GA::ESVector>((*lChildIndiv)[i]);
for(unsigned int j=0; j<lChildGenoI->size(); ++j) {
(*lChildGenoI)[j].mValue /= double(lCountGenoSum[i][j]);
(*lChildGenoI)[j].mStrategy /= double(lCountGenoSum[i][j]);
}
}
Beagle_LogDebugM(
ioContext.getSystem().getLogger(),
"crossover", "Beagle::GA::RecombinationESVecOp",
"Individual generated by recombination"
);
Beagle_LogObjectDebugM(
ioContext.getSystem().getLogger(),
"crossover", "Beagle::GA::RecombinationESVecOp",
*lChildIndiv
);
return lChildIndiv;
Beagle_StackTraceEndM("Individual::Handle Beagle::GA::RecombinationESVecOp::recombine(Individual::Bag& inIndivPool,Context& ioContext)");
}