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 /**************************************************************************************************/
 
-EstOutput Unweighted::getValues(Tree* t) {
+EstOutput Unweighted::getValues(Tree* t, int p, string o) {
        try {
-               globaldata = GlobalData::getInstance();
-               
-               vector<string> groups;
-               double UniqueBL;  //a branch length is unique if it's chidren are from the same group
-               double totalBL; //all branch lengths
-               double UW;              //Unweighted Value = UniqueBL / totalBL;
-               map<string, int>::iterator it;  //iterator to traverse pgroups
-               map<string, int> copyIpcount;
-
-       
+               processors = p;
+               outputDir = o;
+        
+        CountTable* ct = t->getCountTable();
+        
                //if the users enters no groups then give them the score of all groups
-               int numGroups = globaldata->Groups.size();
+               int numGroups = m->getNumGroups();
                
                //calculate number of comparsions
                int numComp = 0;
+               vector< vector<string> > namesOfGroupCombos;
                for (int r=0; r<numGroups; r++) { 
-                       for (int l = r+1; l < numGroups; l++) {
+                       for (int l = 0; l < r; l++) {
                                numComp++;
+                               vector<string> groups; groups.push_back((m->getGroups())[r]); groups.push_back((m->getGroups())[l]);
+                               namesOfGroupCombos.push_back(groups);
                        }
                }
-
-               //numComp+1 for AB, AC, BC, ABC
-               data.resize(numComp+1,0);
-               
-               int count = 0;
-               for (int a=0; a<numGroups; a++) { 
-                       for (int l = a+1; l < numGroups; l++) {
-                               UniqueBL=0.0000;  //a branch length is unique if it's chidren are from the same group
-                               totalBL = 0.00; //all branch lengths
-                               UW = 0.00;              //Unweighted Value = UniqueBL / totalBL;
-                               copyIpcount.clear();
-                               
-                               //groups in this combo
-                               groups.push_back(globaldata->Groups[a]); groups.push_back(globaldata->Groups[l]);
-               
-                               for(int i=t->getNumLeaves();i<t->getNumNodes();i++){
                
-                                       int lc = t->tree[i].getLChild();  //lc = vector index of left child
-                                       int rc = t->tree[i].getRChild();  //rc = vector index of right child
-                       
-                                       /**********************************************************************/
-                                       //This section adds in all lengths that are non leaf
-                       
-                                       copyIpcount = t->tree[i].pcount;
-                                       for (it = copyIpcount.begin(); it != copyIpcount.end(); it++) {
-                                               if (inUsersGroups(it->first, groups) != true) { copyIpcount.erase(it->first);   }
-                                       }
-                       
-                                       //if i's children are from the same group then i's pcount size will be 1 
-                                       //if copyIpcount.size() = 0 they are from a branch that is entirely from a group the user doesn't want
-                                       if (copyIpcount.size() == 0) { }
-                                       else if ((t->tree[i].getBranchLength() != -1) && (copyIpcount.size() == 1)) {  UniqueBL += t->tree[i].getBranchLength();        }
-                       
-                                       //add i's BL to total if it is from the groups the user wants
-                                       if ((t->tree[i].getBranchLength() != -1) && (copyIpcount.size() != 0)) {  
-                                               totalBL += t->tree[i].getBranchLength(); 
-                                       }
-                       
-                                       /**********************************************************************/
-                                       //This section adds in all lengths that are leaf
-                       
-                                       //if i's chidren are leaves
-                                       if (t->tree[rc].getRChild() == -1) {
-                                               //if rc is a valid group and rc has a BL
-                                               if ((inUsersGroups(t->tree[rc].getGroup(), groups) == true) && (t->tree[rc].getBranchLength() != -1)) {
-                                                       UniqueBL += t->tree[rc].getBranchLength();
-                                                       totalBL += t->tree[rc].getBranchLength(); 
-                                               }
-                                       }
-                       
-                                       if (t->tree[lc].getLChild() == -1) {
-                                               //if lc is a valid group and lc has a BL
-                                               if ((inUsersGroups(t->tree[lc].getGroup(), groups) == true) && (t->tree[lc].getBranchLength() != -1)) {
-                                                       UniqueBL += t->tree[lc].getBranchLength();
-                                                       totalBL += t->tree[lc].getBranchLength(); 
-                                               }
+               if (numComp != 1) {
+                       vector<string> groups;
+                       if (numGroups == 0) {
+                               //get score for all users groups
+                               for (int i = 0; i < (ct->getNamesOfGroups()).size(); i++) {
+                                       if ((ct->getNamesOfGroups())[i] != "xxx") {
+                                               groups.push_back((ct->getNamesOfGroups())[i]);
                                        }
-                       
-                                       /**********************************************************************/
                                }
+                               namesOfGroupCombos.push_back(groups);
+                       }else {
+                               for (int i = 0; i < m->getNumGroups(); i++) {
+                                       groups.push_back((m->getGroups())[i]);
+                               }
+                               namesOfGroupCombos.push_back(groups);
+                       }
+               }
+        
+        lines.clear();
+        int numPairs = namesOfGroupCombos.size();
+        int numPairsPerProcessor = numPairs / processors;
+        
+        for (int i = 0; i < processors; i++) {
+            int startPos = i * numPairsPerProcessor;
+            if(i == processors - 1){ numPairsPerProcessor = numPairs - i * numPairsPerProcessor; }
+            lines.push_back(linePair(startPos, numPairsPerProcessor));
+        }
+        
+        data = createProcesses(t, namesOfGroupCombos, ct);
+
+        lines.clear();
+        
+               return data;
+       }
+       catch(exception& e) {
+               m->errorOut(e, "Unweighted", "getValues");
+               exit(1);
+       }
+}
+/**************************************************************************************************/
+
+EstOutput Unweighted::createProcesses(Tree* t, vector< vector<string> > namesOfGroupCombos, CountTable* ct) {
+       try {
+        int process = 1;
+               vector<int> processIDS;
                
-                               UW = (UniqueBL / totalBL);  
-       
-                               if (isnan(UW) || isinf(UW)) { UW = 0; }
-       
-                               data[count] = UW;
-                               count++;
-                               groups.clear();
+               EstOutput results;
+#if defined (__APPLE__) || (__MACH__) || (linux) || (__linux) || (__linux__) || (__unix__) || (__unix)
+               
+               
+               //loop through and create all the processes you want
+               while (process != processors) {
+                       int pid = fork();
+                       
+                       if (pid > 0) {
+                               processIDS.push_back(pid);  //create map from line number to pid so you can append files in correct order later
+                               process++;
+                       }else if (pid == 0){
+                               EstOutput myresults;
+                               myresults = driver(t, namesOfGroupCombos, lines[process].start, lines[process].num, ct);
+                               
+                               if (m->control_pressed) { exit(0); }
+                               
+                               //m->mothurOut("Merging results."); m->mothurOutEndLine();
+                               
+                               //pass numSeqs to parent
+                               ofstream out;
+                               string tempFile = outputDir + toString(getpid()) + ".unweighted.results.temp";
+                               m->openOutputFile(tempFile, out);
+                               out << myresults.size() << endl;
+                               for (int i = 0; i < myresults.size(); i++) {  out << myresults[i] << '\t';  } out << endl;
+                               out.close();
+                               
+                               exit(0);
+                       }else { 
+                               m->mothurOut("[ERROR]: unable to spawn the necessary processes."); m->mothurOutEndLine(); 
+                               for (int i = 0; i < processIDS.size(); i++) { kill (processIDS[i], SIGINT); }
+                               exit(0); 
                        }
                }
                
+               results = driver(t, namesOfGroupCombos, lines[0].start, lines[0].num, ct);
                
-               if (numComp != 1) {
-                       if (numGroups == 0) {
-                               //get score for all users groups
-                               for (int i = 0; i < tmap->namesOfGroups.size(); i++) {
-                                       groups.push_back(tmap->namesOfGroups[i]);
-                               }
-                       }else {
-                               for (int i = 0; i < globaldata->Groups.size(); i++) {
-                                       groups.push_back(globaldata->Groups[i]);
+               //force parent to wait until all the processes are done
+               for (int i=0;i<(processors-1);i++) { 
+                       int temp = processIDS[i];
+                       wait(&temp);
+               }
+               
+               if (m->control_pressed) { return results; }
+               
+               //get data created by processes
+               for (int i=0;i<(processors-1);i++) { 
+                       ifstream in;
+                       string s = outputDir + toString(processIDS[i]) + ".unweighted.results.temp";
+                       m->openInputFile(s, in);
+                       
+                       //get quantiles
+                       if (!in.eof()) {
+                               int num;
+                               in >> num; m->gobble(in);
+                               
+                               if (m->control_pressed) { break; }
+                               
+                               double w; 
+                               for (int j = 0; j < num; j++) {
+                                       in >> w;
+                                       results.push_back(w);
                                }
+                               m->gobble(in);
                        }
+                       in.close();
+                       m->mothurRemove(s);
+               }
+#else
+               //fill in functions
+        vector<unweightedData*> pDataArray;
+               DWORD   dwThreadIdArray[processors-1];
+               HANDLE  hThreadArray[processors-1];
+        vector<CountTable*> cts;
+        vector<Tree*> trees;
+               
+               //Create processor worker threads.
+               for( int i=1; i<processors; i++ ){
+            CountTable* copyCount = new CountTable();
+            copyCount->copy(ct);
+            Tree* copyTree = new Tree(copyCount);
+            copyTree->getCopy(t);
+            
+            cts.push_back(copyCount);
+            trees.push_back(copyTree);
+            
+            unweightedData* tempweighted = new unweightedData(m, lines[i].start, lines[i].num, namesOfGroupCombos, copyTree, copyCount, includeRoot);
+                       pDataArray.push_back(tempweighted);
+                       processIDS.push_back(i);
+            
+                       hThreadArray[i-1] = CreateThread(NULL, 0, MyUnWeightedThreadFunction, pDataArray[i-1], 0, &dwThreadIdArray[i-1]);
+               }
                
-                       UniqueBL=0.0000;  //a branch length is unique if it's chidren are from the same group
-                       totalBL = 0.00; //all branch lengths
-                       UW = 0.00;              //Unweighted Value = UniqueBL / totalBL;
-                       copyIpcount.clear();
+               results = driver(t, namesOfGroupCombos, lines[0].start, lines[0].num, ct);
+               
+               //Wait until all threads have terminated.
+               WaitForMultipleObjects(processors-1, hThreadArray, TRUE, INFINITE);
+               
+               //Close all thread handles and free memory allocations.
+               for(int i=0; i < pDataArray.size(); i++){
+            for (int j = 0; j < pDataArray[i]->results.size(); j++) {  results.push_back(pDataArray[i]->results[j]);  }
+                       delete cts[i];
+            delete trees[i];
+                       CloseHandle(hThreadArray[i]);
+                       delete pDataArray[i];
+               }
+
+#endif 
+        return results;
+       }
+       catch(exception& e) {
+               m->errorOut(e, "Unweighted", "createProcesses");
+               exit(1);
+       }
+}
+/**************************************************************************************************/
+EstOutput Unweighted::driver(Tree* t, vector< vector<string> > namesOfGroupCombos, int start, int num, CountTable* ct) { 
+ try {
+       
+        
+               EstOutput results; results.resize(num);
+               
+               int count = 0;
+               int total = num;
+                                       
+               for (int h = start; h < (start+num); h++) {
                                
-                       for(int i=t->getNumLeaves();i<t->getNumNodes();i++){
+                       if (m->control_pressed) { return results; }
                
-                               int lc = t->tree[i].getLChild();  //lc = vector index of left child
-                               int rc = t->tree[i].getRChild();  //rc = vector index of right child
-                       
-                               /**********************************************************************/
-                               //This section adds in all lengths that are non leaf
-                       
-                               copyIpcount = t->tree[i].pcount;
-                               for (it = copyIpcount.begin(); it != copyIpcount.end(); it++) {
-                                       if (inUsersGroups(it->first, groups) != true) { copyIpcount.erase(it->first);   }
-                               }
-                       
-                               //if i's children are from the same group then i's pcount size will be 1 
-                               //if copyIpcount.size() = 0 they are from a branch that is entirely from a group the user doesn't want
-                               if (copyIpcount.size() == 0) { }
-                               else if ((t->tree[i].getBranchLength() != -1) && (copyIpcount.size() == 1)) {  UniqueBL += t->tree[i].getBranchLength();        }
-                       
-                               //add i's BL to total if it is from the groups the user wants
-                               if ((t->tree[i].getBranchLength() != -1) && (copyIpcount.size() != 0)) {  
-                                       totalBL += t->tree[i].getBranchLength(); 
-                               }
-                       
-                               /**********************************************************************/
-                               //This section adds in all lengths that are leaf
+                       double UniqueBL=0.0000;  //a branch length is unique if it's chidren are from the same group
+                       double totalBL = 0.00;  //all branch lengths
+                       double UW = 0.00;               //Unweighted Value = UniqueBL / totalBL;
+                                               
+                       //find a node that belongs to one of the groups in this combo
+                       int nodeBelonging = -1;
+                       for (int g = 0; g < namesOfGroupCombos[h].size(); g++) {
+                               if (t->groupNodeInfo[namesOfGroupCombos[h][g]].size() != 0) { nodeBelonging = t->groupNodeInfo[namesOfGroupCombos[h][g]][0]; break; }
+                       }
                        
-                               //if i's chidren are leaves
-                               if (t->tree[rc].getRChild() == -1) {
-                                       //if rc is a valid group and rc has a BL
-                                       if ((inUsersGroups(t->tree[rc].getGroup(), groups) == true) && (t->tree[rc].getBranchLength() != -1)) {
-                                               UniqueBL += t->tree[rc].getBranchLength();
-                                               totalBL += t->tree[rc].getBranchLength(); 
+                       //sanity check
+                       if (nodeBelonging == -1) {
+                               m->mothurOut("[WARNING]: cannot find a nodes in the tree from grouping "); 
+                               for (int g = 0; g < namesOfGroupCombos[h].size()-1; g++) { m->mothurOut(namesOfGroupCombos[h][g] + "-"); }
+                               m->mothurOut(namesOfGroupCombos[h][namesOfGroupCombos[h].size()-1]);
+                               m->mothurOut(", skipping."); m->mothurOutEndLine(); results[count] = UW;
+                       }else{
+                               //cout << "trying to get root" << endl; 
+                               //if including the root this clears rootForGrouping[namesOfGroupCombos[h]]
+                               getRoot(t, nodeBelonging, namesOfGroupCombos[h]);
+                               //cout << "here" << endl;       
+                               for(int i=0;i<t->getNumNodes();i++){
+                                       
+                                       if (m->control_pressed) {  return data; }
+                                       //cout << i << endl;    
+                                       //pcountSize = 0, they are from a branch that is entirely from a group the user doesn't want
+                                       //pcountSize = 2, not unique to one group
+                                       //pcountSize = 1, unique to one group
+                                       
+                                       int pcountSize = 0;
+                                       for (int j = 0; j < namesOfGroupCombos[h].size(); j++) {
+                                               map<string, int>::iterator itGroup = t->tree[i].pcount.find(namesOfGroupCombos[h][j]);
+                                               if (itGroup != t->tree[i].pcount.end()) { pcountSize++; if (pcountSize > 1) { break; } } 
                                        }
-                               }
-                       
-                               if (t->tree[lc].getLChild() == -1) {
-                                       //if lc is a valid group and lc has a BL
-                                       if ((inUsersGroups(t->tree[lc].getGroup(), groups) == true) && (t->tree[lc].getBranchLength() != -1)) {
-                                               UniqueBL += t->tree[lc].getBranchLength();
-                                               totalBL += t->tree[lc].getBranchLength(); 
+                                       
+                                       
+                                       //unique calc
+                                       if (pcountSize == 0) { }
+                                       else if ((t->tree[i].getBranchLength() != -1) && (pcountSize == 1) && (rootForGrouping[namesOfGroupCombos[h]].count(i) == 0)) { //you have a unique branch length and you are not the root 
+                                               UniqueBL += abs(t->tree[i].getBranchLength()); 
+                                       }
+                                               
+                                       //total calc
+                                       if (pcountSize == 0) { }
+                                       else if ((t->tree[i].getBranchLength() != -1) && (pcountSize != 0) && (rootForGrouping[namesOfGroupCombos[h]].count(i) == 0)) { //you have a branch length and you are not the root 
+                                               totalBL += abs(t->tree[i].getBranchLength()); 
                                        }
                                }
-                       
-                               /**********************************************************************/
-                       }
-               
-                       UW = (UniqueBL / totalBL);  
+       //cout << UniqueBL << '\t' << totalBL << endl;          
+                               UW = (UniqueBL / totalBL);  
        
-                       if (isnan(UW) || isinf(UW)) { UW = 0; }
+                               if (isnan(UW) || isinf(UW)) { UW = 0; }
        
-                       data[count] = UW;
-               }
+                               results[count] = UW;
+                       }
+                       count++;
 
-               return data;
-       
+        }
+               
+               return results; 
        }
        catch(exception& e) {
-               cout << "Standard Error: " << e.what() << " has occurred in the Unweighted class Function getValues. Please contact Pat Schloss at pschloss@microbio.umass.edu." << "\n";
-               exit(1);
-       }
-       catch(...) {
-               cout << "An unknown error has occurred in the Unweighted class function getValues. Please contact Pat Schloss at pschloss@microbio.umass.edu." << "\n";
+               m->errorOut(e, "Unweighted", "driver");
                exit(1);
        }
-
 }
-
 /**************************************************************************************************/
 
-EstOutput Unweighted::getValues(Tree* t, string groupA, string groupB) { 
+EstOutput Unweighted::getValues(Tree* t, string groupA, string groupB, int p, string o) { 
  try {
-       globaldata = GlobalData::getInstance();
-               
-               vector<string> groups;
-               double UniqueBL;  //a branch length is unique if it's chidren are from the same group
-               double totalBL; //all branch lengths
-               double UW;              //Unweighted Value = UniqueBL / totalBL;
-               map<string, int>::iterator it;  //iterator to traverse pgroups
-               map<string, int> copyIpcount;
-               copyTree = new Tree;
-
+               processors = p;
+               outputDir = o;
+               
+        CountTable* ct = t->getCountTable();
+     
                //if the users enters no groups then give them the score of all groups
-               int numGroups = globaldata->Groups.size();
-
+               int numGroups = m->getNumGroups();
+               
                //calculate number of comparsions
                int numComp = 0;
+               vector< vector<string> > namesOfGroupCombos;
                for (int r=0; r<numGroups; r++) { 
-                       for (int l = r+1; l < numGroups; l++) {
+                       for (int l = 0; l < r; l++) {
                                numComp++;
+                               vector<string> groups; groups.push_back((m->getGroups())[r]); groups.push_back((m->getGroups())[l]);
+                               namesOfGroupCombos.push_back(groups);
+                       }
+               }
+               
+               if (numComp != 1) {
+                       vector<string> groups;
+                       if (numGroups == 0) {
+                               //get score for all users groups
+                               for (int i = 0; i < (ct->getNamesOfGroups()).size(); i++) {
+                                       if ((ct->getNamesOfGroups())[i] != "xxx") {
+                                               groups.push_back((ct->getNamesOfGroups())[i]);
+                                       }
+                               }
+                               namesOfGroupCombos.push_back(groups);
+                       }else {
+                               for (int i = 0; i < m->getNumGroups(); i++) {
+                                       groups.push_back((m->getGroups())[i]);
+                               }
+                               namesOfGroupCombos.push_back(groups);
                        }
                }
+     
+        lines.clear();
+        int numPairs = namesOfGroupCombos.size();
+        int numPairsPerProcessor = numPairs / processors;
+     
+        for (int i = 0; i < processors; i++) {
+            int startPos = i * numPairsPerProcessor;
+            if(i == processors - 1){ numPairsPerProcessor = numPairs - i * numPairsPerProcessor; }
+            lines.push_back(linePair(startPos, numPairsPerProcessor));
+        }
+     
+        data = createProcesses(t, namesOfGroupCombos, true, ct);
+        lines.clear();
+
+               return data;
+       }
+       catch(exception& e) {
+               m->errorOut(e, "Unweighted", "getValues");
+               exit(1);
+       }
+}
+/**************************************************************************************************/
 
-               //numComp+1 for AB, AC, BC, ABC
-               data.resize(numComp+1,0);
+EstOutput Unweighted::createProcesses(Tree* t, vector< vector<string> > namesOfGroupCombos, bool usingGroups, CountTable* ct) {
+       try {
+        int process = 1;
+               vector<int> processIDS;
                
-               int count = 0;
-               for (int a=0; a<numGroups; a++) { 
-                       for (int l = a+1; l < numGroups; l++) {
-                               UniqueBL=0.0000;  //a branch length is unique if it's chidren are from the same group
-                               totalBL = 0.00; //all branch lengths
-                               UW = 0.00;              //Unweighted Value = UniqueBL / totalBL;
-                               copyIpcount.clear();
+               EstOutput results;
+#if defined (__APPLE__) || (__MACH__) || (linux) || (__linux) || (__linux__) || (__unix__) || (__unix)
+
+               //loop through and create all the processes you want
+               while (process != processors) {
+                       int pid = fork();
+                       
+                       if (pid > 0) {
+                               processIDS.push_back(pid);  //create map from line number to pid so you can append files in correct order later
+                               process++;
+                       }else if (pid == 0){
+                               EstOutput myresults;
+                               myresults = driver(t, namesOfGroupCombos, lines[process].start, lines[process].num, usingGroups, ct);
                                
-                               //copy random tree passed in
-                               copyTree->getCopy(t);
-                                                               
-                               //groups in this combo
-                               groups.push_back(globaldata->Groups[a]); groups.push_back(globaldata->Groups[l]);
+                               if (m->control_pressed) { exit(0); }
                                
-                               //swap labels in the groups you want to compare
-                               copyTree->assembleRandomUnifracTree(groups[0], groups[1]);
+                               //pass numSeqs to parent
+                               ofstream out;
+                               string tempFile = outputDir + toString(getpid()) + ".unweighted.results.temp";
+                               m->openOutputFile(tempFile, out);
+                               out << myresults.size() << endl;
+                               for (int i = 0; i < myresults.size(); i++) {  out << myresults[i] << '\t';  } out << endl;
+                               out.close();
                                
-                               //copyTree->createNewickFile("random"+groupA+toString(count));
-               
-                               for(int i=copyTree->getNumLeaves();i<copyTree->getNumNodes();i++){
+                               exit(0);
+                       }else { 
+                               m->mothurOut("[ERROR]: unable to spawn the necessary processes."); m->mothurOutEndLine(); 
+                               for (int i = 0; i < processIDS.size(); i++) { kill (processIDS[i], SIGINT); }
+                               exit(0); 
+                       }
+               }
                
-                                       int lc = copyTree->tree[i].getLChild();  //lc = vector index of left child
-                                       int rc = copyTree->tree[i].getRChild();  //rc = vector index of right child
-                       
-                                       /**********************************************************************/
-                                       //This section adds in all lengths that are non leaf
-                       
-                                       copyIpcount = copyTree->tree[i].pcount;
-                                       for (it = copyIpcount.begin(); it != copyIpcount.end(); it++) {
-                                               if (inUsersGroups(it->first, groups) != true) { copyIpcount.erase(it->first);   }
-                                       }
-                       
-                                       //if i's children are from the same group then i's pcount size will be 1 
-                                       //if copyIpcount.size() = 0 they are from a branch that is entirely from a group the user doesn't want
-                                       if (copyIpcount.size() == 0) { }
-                                       else if ((copyTree->tree[i].getBranchLength() != -1) && (copyIpcount.size() == 1)) {  UniqueBL += copyTree->tree[i].getBranchLength();  }
-                       
-                                       //add i's BL to total if it is from the groups the user wants
-                                       if ((copyTree->tree[i].getBranchLength() != -1) && (copyIpcount.size() != 0)) {  
-                                               totalBL += copyTree->tree[i].getBranchLength(); 
-                                       }
-                       
-                                       /**********************************************************************/
-                                       //This section adds in all lengths that are leaf
-                       
-                                       //if i's chidren are leaves
-                                       if (copyTree->tree[rc].getRChild() == -1) {
-                                               //if rc is a valid group and rc has a BL
-                                               if ((inUsersGroups(copyTree->tree[rc].getGroup(), groups) == true) && (copyTree->tree[rc].getBranchLength() != -1)) {
-                                                       UniqueBL += copyTree->tree[rc].getBranchLength();
-                                                       totalBL += copyTree->tree[rc].getBranchLength(); 
-                                               }
-                                       }
-                       
-                                       if (copyTree->tree[lc].getLChild() == -1) {
-                                               //if lc is a valid group and lc has a BL
-                                               if ((inUsersGroups(copyTree->tree[lc].getGroup(), groups) == true) && (copyTree->tree[lc].getBranchLength() != -1)) {
-                                                       UniqueBL += copyTree->tree[lc].getBranchLength();
-                                                       totalBL += copyTree->tree[lc].getBranchLength(); 
-                                               }
-                                       }
-                       
-                                       /**********************************************************************/
-                               }
+               results = driver(t, namesOfGroupCombos, lines[0].start, lines[0].num, usingGroups, ct);
                
-                               UW = (UniqueBL / totalBL);  
-       
-                               if (isnan(UW) || isinf(UW)) { UW = 0; }
-       
-                               data[count] = UW;
-                               count++;
-                               groups.clear();
-                       }
+               //force parent to wait until all the processes are done
+               for (int i=0;i<(processors-1);i++) { 
+                       int temp = processIDS[i];
+                       wait(&temp);
                }
                
+               if (m->control_pressed) { return results; }
                
-               if (numComp != 1) {
-                       if (numGroups == 0) {
-                               //get score for all users groups
-                               for (int i = 0; i < tmap->namesOfGroups.size(); i++) {
-                                       groups.push_back(tmap->namesOfGroups[i]);
-                               }
-                       }else {
-                               for (int i = 0; i < globaldata->Groups.size(); i++) {
-                                       groups.push_back(globaldata->Groups[i]);
+               //get data created by processes
+               for (int i=0;i<(processors-1);i++) { 
+                       ifstream in;
+                       string s = outputDir + toString(processIDS[i]) + ".unweighted.results.temp";
+                       m->openInputFile(s, in);
+                       
+                       //get quantiles
+                       if (!in.eof()) {
+                               int num;
+                               in >> num; m->gobble(in);
+                                       
+                               if (m->control_pressed) { break; }
+                               
+                               double w; 
+                               for (int j = 0; j < num; j++) {
+                                       in >> w;
+                                       
+                                       results.push_back(w);
                                }
+                               m->gobble(in);
                        }
+                       in.close();
+                       m->mothurRemove(s);
+               }
+#else
+       //for some reason it doesn't seem to be calculating hte random trees scores.  all scores are the same even though copytree appears to be randomized.
+        
+        /*
+        //fill in functions
+        vector<unweightedData*> pDataArray;
+               DWORD   dwThreadIdArray[processors-1];
+               HANDLE  hThreadArray[processors-1];
+        vector<CountTable*> cts;
+        vector<Tree*> trees;
+               
+               //Create processor worker threads.
+               for( int i=1; i<processors; i++ ){
+            CountTable* copyCount = new CountTable();
+            copyCount->copy(ct);
+            Tree* copyTree = new Tree(copyCount);
+            copyTree->getCopy(t);
+            
+            cts.push_back(copyCount);
+            trees.push_back(copyTree);
+            
+            unweightedData* tempweighted = new unweightedData(m, lines[i].start, lines[i].num, namesOfGroupCombos, copyTree, copyCount, includeRoot);
+                       pDataArray.push_back(tempweighted);
+                       processIDS.push_back(i);
+            
+                       hThreadArray[i-1] = CreateThread(NULL, 0, MyUnWeightedRandomThreadFunction, pDataArray[i-1], 0, &dwThreadIdArray[i-1]);
+               }
                
-                       UniqueBL=0.0000;  //a branch length is unique if it's chidren are from the same group
-                       totalBL = 0.00; //all branch lengths
-                       UW = 0.00;              //Unweighted Value = UniqueBL / totalBL;
-                       copyIpcount.clear();
+               results = driver(t, namesOfGroupCombos, lines[0].start, lines[0].num, usingGroups, ct);
+               
+               //Wait until all threads have terminated.
+               WaitForMultipleObjects(processors-1, hThreadArray, TRUE, INFINITE);
+               
+               //Close all thread handles and free memory allocations.
+               for(int i=0; i < pDataArray.size(); i++){
+            for (int j = 0; j < pDataArray[i]->results.size(); j++) {  results.push_back(pDataArray[i]->results[j]);  }
+                       delete cts[i];
+            delete trees[i];
+                       CloseHandle(hThreadArray[i]);
+                       delete pDataArray[i];
+               }       */
+        
+        results = driver(t, namesOfGroupCombos, 0, namesOfGroupCombos.size(), usingGroups, ct);
+#endif
+        return results;
+       }
+       catch(exception& e) {
+               m->errorOut(e, "Unweighted", "createProcesses");
+               exit(1);
+       }
+}
+/**************************************************************************************************/
+EstOutput Unweighted::driver(Tree* t, vector< vector<string> > namesOfGroupCombos, int start, int num, bool usingGroups, CountTable* ct) { 
+ try {
+               
+               EstOutput results; results.resize(num);
+               
+               int count = 0;
+               
+               Tree* copyTree = new Tree(ct);
+               
+               for (int h = start; h < (start+num); h++) {
+               
+                       if (m->control_pressed) { return results; }
                
                        //copy random tree passed in
                        copyTree->getCopy(t);
                                
-                       //swap labels in all the groups you want to compare
-                       copyTree->assembleRandomUnifracTree(groups);
-
-                       for(int i=copyTree->getNumLeaves();i<copyTree->getNumNodes();i++){
-               
-                               int lc = copyTree->tree[i].getLChild();  //lc = vector index of left child
-                               int rc = copyTree->tree[i].getRChild();  //rc = vector index of right child
-                       
-                               /**********************************************************************/
-                               //This section adds in all lengths that are non leaf
+                       //swap labels in the groups you want to compare
+                       copyTree->assembleRandomUnifracTree(namesOfGroupCombos[h]);
+                       
+                       double UniqueBL=0.0000;  //a branch length is unique if it's chidren are from the same group
+                       double totalBL = 0.00;  //all branch lengths
+                       double UW = 0.00;               //Unweighted Value = UniqueBL / totalBL;
+                       //find a node that belongs to one of the groups in this combo
+                       int nodeBelonging = -1;
+                       for (int g = 0; g < namesOfGroupCombos[h].size(); g++) {
+                               if (copyTree->groupNodeInfo[namesOfGroupCombos[h][g]].size() != 0) { nodeBelonging = copyTree->groupNodeInfo[namesOfGroupCombos[h][g]][0]; break; }
+                       }
                        
-                               copyIpcount = copyTree->tree[i].pcount;
-                               for (it = copyIpcount.begin(); it != copyIpcount.end(); it++) {
-                                       if (inUsersGroups(it->first, groups) != true) { copyIpcount.erase(it->first);   }
+                       //sanity check
+                       if (nodeBelonging == -1) {
+                               m->mothurOut("[WARNING]: cannot find a nodes in the tree from grouping "); 
+                               for (int g = 0; g < namesOfGroupCombos[h].size()-1; g++) { m->mothurOut(namesOfGroupCombos[h][g] + "-"); }
+                               m->mothurOut(namesOfGroupCombos[h][namesOfGroupCombos[h].size()-1]);
+                               m->mothurOut(", skipping."); m->mothurOutEndLine(); results[count] = UW;
+                       }else{
+                               
+                               //if including the root this clears rootForGrouping[namesOfGroupCombos[h]]
+                               getRoot(copyTree, nodeBelonging, namesOfGroupCombos[h]);
+                               
+                               for(int i=0;i<copyTree->getNumNodes();i++){
+                                       
+                                       if (m->control_pressed) {  return data; }
+                                       
+                                       //pcountSize = 0, they are from a branch that is entirely from a group the user doesn't want
+                                       //pcountSize = 2, not unique to one group
+                                       //pcountSize = 1, unique to one group
+                                       
+                                       int pcountSize = 0;
+                                       for (int j = 0; j < namesOfGroupCombos[h].size(); j++) {
+                                               map<string, int>::iterator itGroup = copyTree->tree[i].pcount.find(namesOfGroupCombos[h][j]);
+                                               if (itGroup != copyTree->tree[i].pcount.end()) { pcountSize++; if (pcountSize > 1) { break; } } 
+                                       }
+                                       
+                                       //unique calc
+                                       if (pcountSize == 0) { }
+                                       else if ((copyTree->tree[i].getBranchLength() != -1) && (pcountSize == 1) && (rootForGrouping[namesOfGroupCombos[h]].count(i) == 0)) { //you have a unique branch length and you are not the root 
+                                               UniqueBL += abs(copyTree->tree[i].getBranchLength()); 
+                                       }
+                                       
+                                       //total calc
+                                       if (pcountSize == 0) { }
+                                       else if ((copyTree->tree[i].getBranchLength() != -1) && (pcountSize != 0) && (rootForGrouping[namesOfGroupCombos[h]].count(i) == 0)) { //you have a branch length and you are not the root 
+                                               totalBL += abs(copyTree->tree[i].getBranchLength()); 
+                                       }
+                                       
                                }
+                               //cout << UniqueBL << '\t' << totalBL << endl;          
+                               UW = (UniqueBL / totalBL);  
+                               
+                               if (isnan(UW) || isinf(UW)) { UW = 0; }
+                               
+                               results[count] = UW;
+            }
+                       count++;
                        
-                               //if i's children are from the same group then i's pcount size will be 1 
-                               //if copyIpcount.size() = 0 they are from a branch that is entirely from a group the user doesn't want
-                               if (copyIpcount.size() == 0) { }
-                               else if ((copyTree->tree[i].getBranchLength() != -1) && (copyIpcount.size() == 1)) {  UniqueBL += copyTree->tree[i].getBranchLength();  }
-                       
-                               //add i's BL to total if it is from the groups the user wants
-                               if ((copyTree->tree[i].getBranchLength() != -1) && (copyIpcount.size() != 0)) {  
-                                       totalBL += copyTree->tree[i].getBranchLength(); 
-                               }
+               }
+               
+               delete copyTree;
+               
+               return results; 
+       }
+       catch(exception& e) {
+               m->errorOut(e, "Unweighted", "driver");
+               exit(1);
+       }
+}
+/**************************************************************************************************/
+int Unweighted::getRoot(Tree* t, int v, vector<string> grouping) { 
+       try {
+               //you are a leaf so get your parent
+               int index = t->tree[v].getParent();
+               
+               if (includeRoot) { 
+                       rootForGrouping[grouping].clear();
+               }else {
                        
-                               /**********************************************************************/
-                               //This section adds in all lengths that are leaf
+                       //my parent is a potential root
+                       rootForGrouping[grouping].insert(index);
                        
-                               //if i's chidren are leaves
-                               if (copyTree->tree[rc].getRChild() == -1) {
-                                       //if rc is a valid group and rc has a BL
-                                       if ((inUsersGroups(copyTree->tree[rc].getGroup(), groups) == true) && (copyTree->tree[rc].getBranchLength() != -1)) {
-                                               UniqueBL += copyTree->tree[rc].getBranchLength();
-                                               totalBL += copyTree->tree[rc].getBranchLength(); 
-                                       }
+                       //while you aren't at root
+                       while(t->tree[index].getParent() != -1){
+                               //cout << index << endl;        
+                               if (m->control_pressed) {  return 0; }
+                               
+                               //am I the root for this grouping? if so I want to stop "early"
+                               //does my sibling have descendants from the users groups? 
+                               //if so I am not the root
+                               int parent = t->tree[index].getParent();
+                               int lc = t->tree[parent].getLChild();
+                               int rc = t->tree[parent].getRChild();
+                               
+                               int sib = lc;
+                               if (lc == index) { sib = rc; }
+                               
+                               map<string, int>::iterator itGroup;
+                               int pcountSize = 0;
+                               for (int j = 0; j < grouping.size(); j++) {
+                                       map<string, int>::iterator itGroup = t->tree[sib].pcount.find(grouping[j]);
+                                       if (itGroup != t->tree[sib].pcount.end()) { pcountSize++; if (pcountSize > 1) { break; } } 
                                }
-                       
-                               if (copyTree->tree[lc].getLChild() == -1) {
-                                       //if lc is a valid group and lc has a BL
-                                       if ((inUsersGroups(copyTree->tree[lc].getGroup(), groups) == true) && (copyTree->tree[lc].getBranchLength() != -1)) {
-                                               UniqueBL += copyTree->tree[lc].getBranchLength();
-                                               totalBL += copyTree->tree[lc].getBranchLength(); 
-                                       }
+                               
+                               //if yes, I am not the root
+                               if (pcountSize != 0) {
+                                       rootForGrouping[grouping].clear();
+                                       rootForGrouping[grouping].insert(parent);
                                }
+                               
+                               index = parent; 
+                       }
                        
-                               /**********************************************************************/
+                       //get all nodes above the root to add so we don't add their u values above
+                       index = *(rootForGrouping[grouping].begin());
+                       while(t->tree[index].getParent() != -1){
+                               int parent = t->tree[index].getParent();
+                               rootForGrouping[grouping].insert(parent);
+                               //cout << parent << " in root" << endl;
+                               index = parent;
                        }
-               
-                       UW = (UniqueBL / totalBL);  
-       
-                       if (isnan(UW) || isinf(UW)) { UW = 0; }
-       
-                       data[count] = UW;
                }
-
-               return data;
-       
+               
+               return 0;
        }
        catch(exception& e) {
-               cout << "Standard Error: " << e.what() << " has occurred in the Unweighted class Function getValues. Please contact Pat Schloss at pschloss@microbio.umass.edu." << "\n";
-               exit(1);
-       }
-       catch(...) {
-               cout << "An unknown error has occurred in the Unweighted class function getValues. Please contact Pat Schloss at pschloss@microbio.umass.edu." << "\n";
+               m->errorOut(e, "Unweighted", "getRoot");
                exit(1);
        }
 }
-
-
+/**************************************************************************************************/