TreeTemplate<Node>* TreeTools::thresholdConsensus(const vector<Tree*>& vecTr, double threshold, bool checkNames) throw (Exception)
{
vector<size_t> bipScore;
vector<string> tr0leaves;
BipartitionList* bipL;
double score;
if (vecTr.size() == 0)
throw Exception("TreeTools::thresholdConsensus. Empty vector passed");
/* check names */
if (checkNames)
{
tr0leaves = vecTr[0]->getLeavesNames();
for (size_t i = 1; i < vecTr.size(); i++)
{
if (!VectorTools::haveSameElements(vecTr[i]->getLeavesNames(), tr0leaves))
throw Exception("TreeTools::thresholdConsensus. Distinct leaf sets between trees");
}
}
bipL = bipartitionOccurrences(vecTr, bipScore);
for (size_t i = bipL->getNumberOfBipartitions(); i > 0; i--)
{
if (bipL->getPartitionSize(i - 1) == 1)
continue;
score = static_cast<int>(bipScore[i - 1]) / static_cast<double>(vecTr.size());
if (score <= threshold && score != 1.)
{
bipL->deleteBipartition(i - 1);
continue;
}
if (score > 0.5)
continue;
for (size_t j = bipL->getNumberOfBipartitions(); j > i; j--)
{
if (!bipL->areCompatible(i - 1, j - 1))
{
bipL->deleteBipartition(i - 1);
break;
}
}
}
TreeTemplate<Node>* tr = bipL->toTree();
delete bipL;
return tr;
}
TreeTemplate<Node>* BipartitionList::toTree() const throw (Exception)
{
BipartitionList* sortedBipL;
vector<int*> sortedBitBipL;
int* bip;
vector<Node*> vecNd, sonNd;
vector<bool> alive;
size_t lword, nbword, nbint, ii;
/* check, copy and prepare bipartition list */
if (!BipartitionList::areAllCompatible())
throw Exception("Trying to build a tree from incompatible bipartitions");
sortedBipL = dynamic_cast<BipartitionList*>(clone());
for (size_t i = 0; i < sortedBipL->getNumberOfBipartitions(); i++)
{
if (sortedBipL->getPartitionSize(i) > sortedBipL->getNumberOfElements() / 2)
sortedBipL->flip(i);
}
sortedBipL->sortByPartitionSize();
sortedBipL->removeRedundantBipartitions();
sortedBitBipL = sortedBipL->getBitBipartitionList();
for (size_t i = 0; i < sortedBipL->getNumberOfBipartitions(); i++)
{
alive.push_back(true);
}
vecNd.resize(sortedBipL->getNumberOfBipartitions() + 1);
lword = static_cast<size_t>(BipartitionTools::LWORD);
nbword = (elements_.size() + lword - 1) / lword;
nbint = nbword * lword / (CHAR_BIT * sizeof(int));
bip = new int[1]; bip[0] = 0;
/* main loop: create one node per bipartition */
for (size_t i = 0; i < sortedBipL->getNumberOfBipartitions(); i++)
{
if (sortedBipL->getPartitionSize(i) == 1)
{ // terminal
for (size_t j = 0; j < sortedBipL->getNumberOfElements(); j++)
{
if (BipartitionTools::testBit(sortedBitBipL[i], static_cast<int>(j)))
{
vecNd[i] = new Node(elements_[j]);
break;
}
}
}
else
{ // internal
sonNd.clear();
for (size_t j = 0; j < i; j++)
{
if (alive[j])
{
for (ii = 0; ii < nbint; ii++)
{
BipartitionTools::bitOr(bip, sortedBitBipL[j] + ii, sortedBitBipL[i] + ii, 1);
if (bip[0] != sortedBitBipL[i][ii])
break;
}
if (ii == nbint)
{
sonNd.push_back(vecNd[j]);
alive[j] = false;
}
}
}
vecNd[i] = new Node();
for (size_t k = 0; k < sonNd.size(); k++)
{
vecNd[i]->addSon(sonNd[k]);
}
}
}
/* create last node, which joins alive bipartitions = fatherless nodes */
Node* rootNd = new Node();
for (size_t i = 0; i < sortedBipL->getNumberOfBipartitions(); i++)
{
if (alive[i])
rootNd->addSon(vecNd[i]);
}
/* construct tree and return */
TreeTemplate<Node>* tr = new TreeTemplate<Node>(rootNd);
tr->resetNodesId();
delete sortedBipL;
return tr;
}
BipartitionList* TreeTools::bipartitionOccurrences(const vector<Tree*>& vecTr, vector<size_t>& bipScore)
{
vector<BipartitionList*> vecBipL;
BipartitionList* mergedBipL;
vector<size_t> bipSize;
size_t nbBip;
/* build and merge bipartitions */
for (size_t i = 0; i < vecTr.size(); i++)
{
vecBipL.push_back(new BipartitionList(*vecTr[i]));
}
mergedBipL = BipartitionTools::mergeBipartitionLists(vecBipL);
for (size_t i = 0; i < vecTr.size(); i++)
{
delete vecBipL[i];
}
mergedBipL->removeTrivialBipartitions();
nbBip = mergedBipL->getNumberOfBipartitions();
bipScore.clear();
for (size_t i = 0; i < nbBip; i++)
{
bipSize.push_back(mergedBipL->getPartitionSize(i));
bipScore.push_back(1);
}
/* compare bipartitions */
for (size_t i = nbBip; i > 0; i--)
{
if (bipScore[i - 1] == 0)
continue;
for (size_t j = i - 1; j > 0; j--)
{
if (bipScore[j - 1] && bipSize[i - 1] == bipSize[j - 1] && mergedBipL->areIdentical(i - 1, j - 1))
{
bipScore[i - 1]++;
bipScore[j - 1] = 0;
}
}
}
/* keep only distinct bipartitions */
for (size_t i = nbBip; i > 0; i--)
{
if (bipScore[i - 1] == 0)
{
bipScore.erase(bipScore.begin() + static_cast<ptrdiff_t>(i - 1));
mergedBipL->deleteBipartition(i - 1);
}
}
/* add terminal branches */
mergedBipL->addTrivialBipartitions(false);
for (size_t i = 0; i < mergedBipL->getNumberOfElements(); i++)
{
bipScore.push_back(vecTr.size());
}
return mergedBipL;
}