/*!
* \brief Standard mutate a constrained GP individual.
* \param ioIndividual GP individual to standard mutate.
* \param ioContext Context of the evolution.
* \return True if the individual is effectively mutated, false if not.
*/
bool STGP::MutationStandardConstrainedOp::mutate(Beagle::Individual& ioIndividual, Beagle::Context& ioContext)
{
Beagle_StackTraceBeginM();
GP::Individual& lIndividual = castObjectT<GP::Individual&>(ioIndividual);
GP::Context& lContext = castObjectT<GP::Context&>(ioContext);
unsigned int lMaxTreeDepth = mMaxTreeDepth->getWrappedValue();
unsigned int lMaxRegenerationDepth = mMaxRegenerationDepth->getWrappedValue();
unsigned int lNbNodes = 0;
for(unsigned int i=0; i<lIndividual.size(); i++) lNbNodes += lIndividual[i]->size();
if(lNbNodes == 0) return false;
unsigned int lChoosenNode = lContext.getSystem().getRandomizer().rollInteger(0, lNbNodes-1);
unsigned int lChoosenTree = 0;
for(; (lChoosenTree+1)<lIndividual.size(); lChoosenTree++) {
if(lChoosenNode < lIndividual[lChoosenTree]->size()) break;
else lChoosenNode -= lIndividual[lChoosenTree]->size();
}
const Factory& lFactory = ioContext.getSystem().getFactory();
GP::Tree::Alloc::Handle lTreeAlloc =
castHandleT<GP::Tree::Alloc>(lFactory.getConceptAllocator("Genotype"));
unsigned int lOldGenotypeIndex = lContext.getGenotypeIndex();
GP::Tree::Handle lOldGenotypeHandle = lContext.getGenotypeHandle();
Beagle_LogDebugM(
ioContext.getSystem().getLogger(),
"Individual before GP standard mutation"
);
Beagle_LogDebugM(
ioContext.getSystem().getLogger(),
ioIndividual
);
GP::Tree::Handle lActualTree = lIndividual[lChoosenTree];
GP::Tree::Handle lNewTree = castHandleT<GP::Tree>(lTreeAlloc->allocate());
lNewTree->setPrimitiveSetIndex(lActualTree->getPrimitiveSetIndex());
lNewTree->setNumberArguments(lActualTree->getNumberArguments());
unsigned int lChoosenNodeSubTreeSize = (*lActualTree)[lChoosenNode].mSubTreeSize;
lNewTree->insert(lNewTree->end(), lActualTree->begin(), lActualTree->begin()+lChoosenNode);
lContext.setGenotypeIndex(lChoosenTree);
lContext.setGenotypeHandle(lActualTree);
lContext.emptyCallStack();
lActualTree->setContextToNode(lChoosenNode, lContext);
lContext.popCallStack();
const unsigned int lMaxSubTreeDepth =
minOf<unsigned int>(lMaxTreeDepth - lContext.getCallStackSize(), lMaxRegenerationDepth);
lIndividual[lChoosenTree] = lNewTree;
lContext.setGenotypeHandle(lNewTree);
unsigned int lAttempt=0;
for(; lAttempt < mNumberAttempts->getWrappedValue(); lAttempt++) {
if(mInitOp->initTree(*lNewTree, 1, lMaxSubTreeDepth, lContext) != 0) break;
}
if(lAttempt == mNumberAttempts->getWrappedValue()) {
lIndividual[lChoosenTree] = lActualTree;
lContext.setGenotypeIndex(lOldGenotypeIndex);
lContext.setGenotypeHandle(lOldGenotypeHandle);
Beagle_LogVerboseM(
ioContext.getSystem().getLogger(),
"Unable to GP standard mutate the individual"
);
return false;
}
Beagle_LogVerboseM(
ioContext.getSystem().getLogger(),
std::string("GP standard mutate the ")+uint2ordinal(lChoosenNode+1)+
std::string(" node of the ")+uint2ordinal(lChoosenTree+1)+
std::string(" tree with max depth ")+uint2str(lMaxSubTreeDepth)
);
lNewTree->insert(lNewTree->end(),
lActualTree->begin()+lChoosenNode+lChoosenNodeSubTreeSize,
lActualTree->end());
unsigned int lDiffSize =
(*lActualTree)[lChoosenNode].mSubTreeSize - (*lNewTree)[lChoosenNode].mSubTreeSize;
for(unsigned int l=0; l<lContext.getCallStackSize(); l++) {
(*lNewTree)[lContext.getCallStackElement(l)].mSubTreeSize -= lDiffSize;
}
lContext.setGenotypeIndex(lOldGenotypeIndex);
lContext.setGenotypeHandle(lOldGenotypeHandle);
Beagle_LogDebugM(
ioContext.getSystem().getLogger(),
"Individual after GP standard mutation"
);
Beagle_LogDebugM(
ioContext.getSystem().getLogger(),
ioIndividual
);
return true;
Beagle_StackTraceEndM();
}
/*!
* \brief Standard mutate a constrained GP individual.
* \param ioIndividual GP individual to standard mutate.
* \param ioContext Context of the evolution.
* \return True if the individual is effectively mutated, false if not.
*/
bool GP::MutationStandardSelectiveConstrainedOp::mutate(Beagle::Individual& ioIndividual, Beagle::Context& ioContext)
{
Beagle_StackTraceBeginM();
GP::Individual& lIndividual = castObjectT<GP::Individual&>(ioIndividual);
GP::Context& lContext = castObjectT<GP::Context&>(ioContext);
unsigned int lMaxTreeDepth = mMaxTreeDepth->getWrappedValue();
unsigned int lMaxRegenerationDepth = mMaxRegenerationDepth->getWrappedValue();
//Select node to mutate
unsigned int lChoosenTree = 0;
unsigned int lChoosenNode = 0;
bool lDoParameterSearch = (lContext.getSystem().getRandomizer().rollUniform(0.0, 1.0) <= mMutParameterPb->getWrappedValue());
//Select primitive based on type
for(unsigned int lTry = 0; lTry < 2; ++lTry) { //Do only twice
std::vector<const std::type_info*> lDesiredTypes(1, ArgEph);
RouletteT< std::pair<unsigned int,unsigned int> > lRoulette;
SelectiveConstrainedSelectionOp::buildRoulette(lRoulette, lDesiredTypes, lIndividual, lContext,!lDoParameterSearch,lDoParameterSearch);
if(lRoulette.size() == 0) {
if(lDoParameterSearch) {
Beagle_LogVerboseM(
ioContext.getSystem().getLogger(),
"mutation", "Beagle::GP::MutationStandardSelectiveConstrainedOp",
string("No EphemeralDouble node found.")
);
}
else {
Beagle_LogVerboseM(
ioContext.getSystem().getLogger(),
"mutation", "Beagle::GP::MutationStandardSelectiveConstrainedOp",
string("No non EphemeralDouble node found.")
);
}
lDoParameterSearch = !lDoParameterSearch;
if(lTry >= 1) {
Beagle_LogVerboseM(
ioContext.getSystem().getLogger(),
"mutation", "Beagle::GP::MutationStandardSelectiveConstrainedOp",
"Unable to GP standard mutate the individual"
);
return false;
}
}
else {
std::pair<unsigned int,unsigned int> lSelectedNode = lRoulette.select(ioContext.getSystem().getRandomizer());
lChoosenTree = lSelectedNode.first;
lChoosenNode = lSelectedNode.second;
break;
}
}
if(lDoParameterSearch) {
Beagle_LogVerboseM(
ioContext.getSystem().getLogger(),
"mutation", "Beagle::GP::MutationStandardSelectiveConstrainedOp",
string("Mutation applied only on EphemeralDouble node.")
);
}
else {
Beagle_LogVerboseM(
ioContext.getSystem().getLogger(),
"mutation", "Beagle::GP::MutationStandardSelectiveConstrainedOp",
string("Mutation applied on node that are not EphemeralDouble.")
);
}
unsigned int lOldGenotypeIndex = lContext.getGenotypeIndex();
GP::Tree::Handle lOldGenotypeHandle = lContext.getGenotypeHandle();
Beagle_LogDebugM(
ioContext.getSystem().getLogger(),
"mutation", "Beagle::GP::MutationStandardSelectiveConstrainedOp",
std::string("Individual before GP standard mutation: ")+
ioIndividual.serialize()
);
GP::Tree::Handle lActualTree = lIndividual[lChoosenTree];
GP::Tree::Handle lNewTree = castHandleT<GP::Tree>(lIndividual.getTypeAlloc()->allocate());
lNewTree->setPrimitiveSetIndex(lActualTree->getPrimitiveSetIndex());
lNewTree->setNumberArguments(lActualTree->getNumberArguments());
unsigned int lChoosenNodeSubTreeSize = (*lActualTree)[lChoosenNode].mSubTreeSize;
lNewTree->insert(lNewTree->end(), lActualTree->begin(), lActualTree->begin()+lChoosenNode);
lContext.setGenotypeIndex(lChoosenTree);
lContext.setGenotypeHandle(lActualTree);
lContext.emptyCallStack();
lActualTree->setContextToNode(lChoosenNode, lContext);
lContext.popCallStack();
const unsigned int lMaxSubTreeDepth =
minOf<unsigned int>(lMaxTreeDepth - lContext.getCallStackSize(), lMaxRegenerationDepth);
lIndividual[lChoosenTree] = lNewTree;
lContext.setGenotypeHandle(lNewTree);
unsigned int lAttempt=0;
if(lMaxSubTreeDepth >= 1) {
for(; lAttempt < mNumberAttempts->getWrappedValue(); lAttempt++) {
if(mInitOp->initTree(*lNewTree, 1, lMaxSubTreeDepth, lContext) != 0) break;
}
} else {
lAttempt = mNumberAttempts->getWrappedValue();
}
if(lAttempt == mNumberAttempts->getWrappedValue()) {
lIndividual[lChoosenTree] = lActualTree;
lContext.setGenotypeIndex(lOldGenotypeIndex);
lContext.setGenotypeHandle(lOldGenotypeHandle);
Beagle_LogVerboseM(
ioContext.getSystem().getLogger(),
"mutation", "Beagle::GP::MutationStandardSelectiveConstrainedOp",
"Unable to GP standard mutate the individual"
);
return false;
}
if( !lDoParameterSearch ) {
//Set structure id invalid
castHandleT<TreeSTag>((lIndividual)[0])->setStructureIDInvalid();
Beagle_LogVerboseM(
ioContext.getSystem().getLogger(),
"mutation", "Beagle::GP::MutationStandardSelectiveConstrainedOp",
std::string("Set structure id invalid") );
}
Beagle_LogVerboseM(
ioContext.getSystem().getLogger(),
"mutation", "Beagle::GP::MutationStandardSelectiveConstrainedOp",
std::string("GP standard mutate the ")+uint2ordinal(lChoosenNode+1)+
std::string(" node, ")+ (*lActualTree)[lChoosenNode].mPrimitive->getName()
+std::string(", of the ")+uint2ordinal(lChoosenTree+1)+
std::string(" tree with max depth ")+uint2str(lMaxSubTreeDepth)
);
lNewTree->insert(lNewTree->end(),
lActualTree->begin()+lChoosenNode+lChoosenNodeSubTreeSize,
lActualTree->end());
unsigned int lDiffSize =
(*lActualTree)[lChoosenNode].mSubTreeSize - (*lNewTree)[lChoosenNode].mSubTreeSize;
for(unsigned int l=0; l<lContext.getCallStackSize(); l++) {
(*lNewTree)[lContext.getCallStackElement(l)].mSubTreeSize -= lDiffSize;
}
lContext.setGenotypeIndex(lOldGenotypeIndex);
lContext.setGenotypeHandle(lOldGenotypeHandle);
Beagle_LogDebugM(
ioContext.getSystem().getLogger(),
"mutation", "Beagle::GP::MutationStandardSelectiveConstrainedOp",
std::string("Individual after GP standard mutation: ")+
ioIndividual.serialize()
);
return true;
Beagle_StackTraceEndM("bool GP::MutationStandardSelectiveConstrainedOp::mutate(Beagle::Individual& ioIndividual, Beagle::Context& ioContext)");
}
/*!
* \brief Insert mutate a GP individual.
* \param ioIndividual GP individual to mutate.
* \param ioContext Context of the evolution.
* \return True if the individual is effectively mutated, false if not.
*/
bool GP::MutationInsertConstrainedOp::mutate(Beagle::Individual& ioIndividual, Beagle::Context& ioContext)
{
Beagle_StackTraceBeginM();
Beagle_LogDetailedM(
ioContext.getSystem().getLogger(),
"mutation", "Beagle::GP::MutationInsertConstrainedOp",
std::string("Mutating individual with GP::MutationInsertConstrainedOp")
);
GP::Individual& lIndividual = castObjectT<GP::Individual&>(ioIndividual);
GP::Context& lContext = castObjectT<GP::Context&>(ioContext);
const unsigned int lMaxAttempts = mNumberAttempts->getWrappedValue();
const unsigned int lMaxTreeDepth = mMaxTreeDepth->getWrappedValue();
const Factory& lFactory = ioContext.getSystem().getFactory();
GP::Tree::Alloc::Handle lTreeAlloc =
castHandleT<GP::Tree::Alloc>(lFactory.getConceptAllocator("Genotype"));
// Store original context values
const unsigned int lOldGenotypeIndex = lContext.getGenotypeIndex();
const GP::Tree::Handle lOldGenotypeHandle = lContext.getGenotypeHandle();
Beagle_LogDebugM(
ioContext.getSystem().getLogger(),
"mutation", "Beagle::GP::MutationInsertConstrainedOp",
"Individual before constrained GP insert mutation"
);
Beagle_LogObjectDebugM(
ioContext.getSystem().getLogger(),
"mutation", "Beagle::GP::MutationInsertConstrainedOp",
ioIndividual
);
// Mutation attempts loop
for(unsigned int i=0; i<lMaxAttempts; ++i) {
// Choose tree and node to mutate
const unsigned int lChosenTree = lIndividual.chooseRandomTree(lContext);
const unsigned int lChosenNodeIndex = lIndividual.chooseRandomNode(lChosenTree, lContext);
GP::Tree::Handle lOriginalTree = lIndividual[lChosenTree];
// Compute depth of tree generated by mutation
lContext.setGenotypeIndex(lChosenTree);
lContext.setGenotypeHandle(lOriginalTree);
lContext.emptyCallStack();
lOriginalTree->setContextToNode(lChosenNodeIndex, lContext);
const unsigned int lMutationDepth =
lContext.getCallStackSize() + lOriginalTree->getTreeDepth(lChosenNodeIndex);
// Check that mutation will not generate a tree deeper than the maximum allowed depth
if(lMutationDepth > lMaxTreeDepth) {
Beagle_LogDebugM(
ioContext.getSystem().getLogger(),
"mutation", "Beagle::GP::MutationInsertConstrainedOp",
std::string("Constrained insert mutation attempt failed as the generated tree will exceed ")+
std::string("maximum allowed tree depth")
);
continue;
}
// Create new tree
Beagle_LogDebugM(
ioContext.getSystem().getLogger(),
"mutation", "Beagle::GP::MutationInsertConstrainedOp",
std::string("Creating new tree")
);
GP::Tree::Handle lNewTree = castHandleT<GP::Tree>(lTreeAlloc->allocate());
lNewTree->setPrimitiveSetIndex(lOriginalTree->getPrimitiveSetIndex());
lNewTree->setNumberArguments(lOriginalTree->getNumberArguments());
// Replace original tree with new tree
lIndividual[lChosenTree] = lNewTree;
lContext.setGenotypeHandle(lNewTree);
// Copy unchanged part of original tree into new tree
Beagle_LogDebugM(
ioContext.getSystem().getLogger(),
"mutation", "Beagle::GP::MutationInsertConstrainedOp",
std::string("Copying unchanged part of original tree to new tree")
);
lNewTree->insert(lNewTree->end(),
lOriginalTree->begin(),
lOriginalTree->begin()+lChosenNodeIndex);
Beagle_AssertM(lNewTree->size() == lChosenNodeIndex);
// Generate new branch primitive to insert.
GP::PrimitiveSet& lPrimitiveSet = lNewTree->getPrimitiveSet(lContext);
Primitive::Handle lBranchInserted = lPrimitiveSet.select(GP::Primitive::eBranch, lContext);
if(lBranchInserted==NULL) {
Beagle_LogDebugM(
ioContext.getSystem().getLogger(),
"mutation", "Beagle::GP::MutationInsertConstrainedOp",
std::string("Constrained insert mutation attempt failed as it seems impossible ")+
std::string("to select a branch primitive in the actual context")
);
lIndividual[lChosenTree] = lOriginalTree;
lContext.setGenotypeHandle(lOriginalTree);
continue;
}
Beagle_LogDebugM(
ioContext.getSystem().getLogger(),
"mutation", "Beagle::GP::MutationInsertConstrainedOp",
std::string("Branch primitive to be inserted by mutation is primitive '")+
lBranchInserted->getName()+std::string("'")
);
// Insert new branch
lBranchInserted = lBranchInserted->giveReference(GP::Primitive::eBranch, lContext);
lNewTree->push_back(Node(lBranchInserted,1));
if(lBranchInserted->validate(lContext) == false) {
Beagle_LogDebugM(
ioContext.getSystem().getLogger(),
"mutation", "Beagle::GP::MutationInsertConstrainedOp",
std::string("Constrained insert mutation attempt failed as the selected ")+
std::string("branch doesn't match the constraints")
);
lIndividual[lChosenTree] = lOriginalTree;
lContext.setGenotypeHandle(lOriginalTree);
continue;
}
const unsigned int lNbArgsInsertedBranch = lBranchInserted->getNumberArguments();
Beagle_AssertM(lNbArgsInsertedBranch != 0);
const unsigned int lSubtreeArgIndex =
lContext.getSystem().getRandomizer().rollInteger(0, lNbArgsInsertedBranch-1);
Beagle_AssertM(lSubtreeArgIndex < lNbArgsInsertedBranch);
const unsigned int lSubtreeSize = (*lOriginalTree)[lChosenNodeIndex].mSubTreeSize;
// Generate inserted node subtrees
bool lArgsGenFailed = false;
for(unsigned int j=0; j<lNbArgsInsertedBranch; ++j) {
if(j == lSubtreeArgIndex) {
const unsigned int lSubtreeIndex = lNewTree->size();
lNewTree->insert(lNewTree->end(),
lOriginalTree->begin()+lChosenNodeIndex,
lOriginalTree->begin()+lChosenNodeIndex+lSubtreeSize);
lContext.pushCallStack(lSubtreeIndex);
if(lNewTree->validateSubTree(lSubtreeIndex, lContext) == false) {
lArgsGenFailed = true;
break;
}
lContext.popCallStack();
(*lNewTree)[lChosenNodeIndex].mSubTreeSize += lSubtreeSize;
} else {
Primitive::Handle lArgInserted = lPrimitiveSet.select(GP::Primitive::eTerminal, lContext);
if(lArgInserted == NULL) {
lArgsGenFailed = true;
break;
}
lArgInserted = lArgInserted->giveReference(GP::Primitive::eTerminal, lContext);
const unsigned int lSubtreeIndex = lNewTree->size();
lNewTree->push_back(Node(lArgInserted,1));
lContext.pushCallStack(lSubtreeIndex);
if(lArgInserted->validate(lContext) == false) {
lArgsGenFailed = true;
break;
}
lContext.popCallStack();
++(*lNewTree)[lChosenNodeIndex].mSubTreeSize;
}
}
if(lArgsGenFailed) {
Beagle_LogDebugM(
ioContext.getSystem().getLogger(),
"mutation", "Beagle::GP::MutationInsertConstrainedOp",
std::string("Constrained insert mutation attempt failed as it seems impossible ")+
std::string("to select a terminal primitive under the inserted branch in the actual context")
);
lIndividual[lChosenTree] = lOriginalTree;
lContext.setGenotypeHandle(lOriginalTree);
continue;
}
// Complete new tree with rest of original tree
Beagle_AssertM(lOriginalTree->size() >= (lChosenNodeIndex+lSubtreeSize));
lNewTree->insert(lNewTree->end(),
lOriginalTree->begin()+lChosenNodeIndex+lSubtreeSize,
lOriginalTree->end());
Beagle_AssertM(lNewTree->size() == (lOriginalTree->size()+lNbArgsInsertedBranch));
// Correct subtree size data and terminate mutation process
Beagle_LogDebugM(
ioContext.getSystem().getLogger(),
"mutation", "Beagle::GP::MutationInsertConstrainedOp",
std::string("Correcting the 'mSubTreeSize' fields of tree")
);
lContext.popCallStack();
for(unsigned int j=0; j<lContext.getCallStackSize(); ++j) {
(*lNewTree)[lContext[j]].mSubTreeSize += lNbArgsInsertedBranch;
}
// Mutation successful, log messages and return
std::ostringstream lOSS;
lOSS << "Successfully inserted a new node at index " << lChosenNodeIndex;
lOSS << " of the " << uint2ordinal(lChosenTree) << " tree of the actual individual";
Beagle_LogTraceM(
ioContext.getSystem().getLogger(),
"mutation",
"Beagle::GP::MutationInsertConstrainedOp",
lOSS.str()
);
Beagle_LogDebugM(
ioContext.getSystem().getLogger(),
"mutation",
"Beagle::GP::MutationInsertConstrainedOp",
"Individual after constrained GP insert mutation"
);
Beagle_LogObjectDebugM(
ioContext.getSystem().getLogger(),
"mutation",
"Beagle::GP::MutationInsertConstrainedOp",
ioIndividual
);
lContext.emptyCallStack();
lContext.setGenotypeIndex(lOldGenotypeIndex);
lContext.setGenotypeHandle(lOldGenotypeHandle);
return true;
}
// Insert mutation failed, return without mutating the individual
lContext.emptyCallStack();
lContext.setGenotypeIndex(lOldGenotypeIndex);
lContext.setGenotypeHandle(lOldGenotypeHandle);
Beagle_LogTraceM(
ioContext.getSystem().getLogger(),
"mutation", "Beagle::GP::MutationInsertConstrainedOp",
std::string("All constrained insert mutation attempts failed; ")+
std::string("resuming from mutation without modifying the individual")
);
return false;
Beagle_StackTraceEndM("bool GP::MutationInsertConstrainedOp::mutate(Beagle::Individual& ioIndividual, Beagle::Context& ioContext)");
}