Package cs412.hw3.tree

Examples of cs412.hw3.tree.FPTree

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    List<Pattern> Fs = new ArrayList<Pattern>();
    if(tree == null || tree.getChildren().isEmpty() || myDBRef.getTransactions().isEmpty()){//|| tree.getCount() <= 0){
      return Fs;
    }
    BranchAndBound bab = new BranchAndBound(myDBRef,htable);
    Pattern alpha = bab.branch_and_bound(tree,min_sup,null);
    if(alpha == null){
      // no patterns remain to be found under criteria
      return Fs;
    }
    List<Transaction> tidList= myDBRef.computeTIDList(alpha);
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      }
      for(FrequentPattern fpp: fp){
        System.out.println();
      }
      Item ai = child.getLabel();
      Pattern B = new Pattern(alpha);
      B.insertItem(ai);//with support = ai.support
      double ig_b = myDBRef.IG(B);
      boolean isCovered = myDBRef.isCovered(B);
      if(!isCovered){
        return bestPat;
      }
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  /** Builds a conditional FPTree from the transactions contained in this db.
   * @return
   */
  public FPTree buildConditionalFPTree() {
    ConditionalFPTreeBuilder builder = new ConditionalFPTreeBuilder(this,pattern);
    return builder.buildConditionalTree();
  }
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    String fileName = args[0];
    r.processFile(fileName);
    Log.writeInfoDual(new Date()+" :Processed Transactions");
    Log.writeInfoDual(new Date()+" :Building FPTree...");
    FPTreeBuilder b = new FPTreeBuilder(db);
    FPTree t = b.buildTree();
    System.out.println(t.getCount());
    Log.writeInfoDual(new Date()+" :FPTree Built");
    Log.writeInfoDual(new Date()+" :Mining Patterns...");
    DDPMine m = new DDPMine(db,delta);
    List<Pattern> results = m.perform(t);
    DatasetTransformer optimusPrime = new DatasetTransformer(results,r.getLargestItemFound());
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           //add this label to the list so we don't chop off part of the cond pat base until it's count has been calculated
           list.add(new Item(label));
           while(list.size() > 0){
            String tlabel = list.get(0).getItemName();
            list.remove(list.size()-1);
            FPTree temp = tree.getSubTreeByLabel(tlabel);
            for(int i = 1; i<list.size();i++){
              temp = temp.getSubTreeByLabel(list.get(i).getItemName());
            }
            if(temp.getCount() >= min_sup){
              Pattern newp = new Pattern();
              newp.insertItems(list);
              FrequentPattern newFP = new FrequentPattern(newp,temp.getCount());
              if(!newCFP.containsKey(label)){
                 newCFP.put(label, new ArrayList<FrequentPattern>());
               }
               newCFP.get(label).add(newFP);
              break;
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  private static Hashtable<Transaction, FPTree> TID_Node_Map = new Hashtable<Transaction, FPTree>();
 
  private TIDMapping(){};
 
  public static void addTIDMapping(FPTree tree, Transaction tran){
    FPTree result = TID_Node_Map.put(tran,tree);
  }
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    double hhc = 0;
   
    // traverse all header links for the beginning of this pattern item
    //  and calculate the support
    FPTreeHeader header = t.getHeader();
    FPTree tree = header.getHeaderNodeLink().get(i.getItemName());
    List<FPTree> nodeLinks = tree.getNodeLinks();
    nodeLinks.add(0, tree);
    float patSup = 0;
    for(FPTree fptree : nodeLinks){
      patSup += new Float(getPatternSupport(fptree).intValue()).floatValue();
    }
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    tDB.addTransaction(t7);
//    System.out.println(tDB.H_C());
//    Pattern p = new Pattern();
//    p.insertItem(new Item("d"));
    FPTreeBuilder b = new FPTreeBuilder(tDB);
    FPTree t = b.buildTree();
//    System.out.println(tDB.H_C_Cond_X(p));
//    System.out.println(tDB.IG(p));
//   
//    DDPMine m = new DDPMine(tDB,1);
//    List<Pattern> results = m.perform(t.getHeader());
//    System.out.println(results);
    Pattern pp = new Pattern();
    pp.insertItem(new Item("d"));
//    pp.insertItem(new Item("b"));
    ConditionalDB d = tDB.getConditionalDBForPattern(pp);
    FPTree tr = d.buildConditionalFPTree();
   
  }
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   * @param tidList
   */
  private  void update_tree(List<Transaction> tidList) {
    for(Transaction t: tidList){
      if(ctable.isTransactionReadyForRemoval(t)){
        FPTree tree = TIDMapping.getTreeForTransaction(t);
        if(tree != null){
          tree.progressivelyShrinkToRootFromMe();
        }
        myDBRef.removeTransaction(t);
      }
    }
  }
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      if(maxIG > ig_ub_DB_CARDINALITY){
        //skip mining on Db
      }
      else{
        ConditionalDB cond_db_for_B = myDBRef.getConditionalDBForPattern(B);
        FPTree Pb = cond_db_for_B.buildConditionalFPTree();
        if(Pb.getCount() == P.getCount()){
          System.out.println("skipping an entire branch since support is the same");
        }else{
          branch_and_bound(Pb,s,B);
        }
      }
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Related Classes of cs412.hw3.tree.FPTree

  • cs412.hw3.BranchAndBound
  • cs412.hw3.data.ConditionalDB
  • cs412.hw3.data.Transaction
  • cs412.hw3.data.TransactionDB
  • cs412.hw3.DatasetTransformer
  • cs412.hw3.DDPMine
  • cs412.hw3.InputFileReader
  • cs412.hw3.item.FrequentItem
  • cs412.hw3.item.Item
  • cs412.hw3.Main
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