/**
 * 随机森林 回归问题
 * @author ysh  1208706282
 *
 */
public class RandomForest {
  List mSamples;
  List mCarts;
  double mFeatureRate;
  int mMaxDepth;
  int mMinLeaf;
  Random mRandom;
  /**
   * 加载数据  回归树
   * @param path
   * @param regex
   * @throws Exception
   */
  public void loadData(String path,String regex) throws Exception{
    mSamples = new ArrayList();
    BufferedReader reader = new BufferedReader(new FileReader(path));
    String line = null;
    String splits[] = null;
    Sample sample = null;
    while(null != (line=reader.readLine())){
      splits = line.split(regex);
      sample = new Sample();
      sample.label = Double.valueOf(splits[0]);
      sample.feature = new ArrayList(splits.length-1);
      for(int i=0;i(iters);
    Cart cart = null;
    for(int iter=0;iter s = new ArrayList(mSamples.size());
      for(int i=0;i samples = Cart.loadTestData("F:/2016-contest/20161001/valid_data_1.csv", true, ",");
    double sum = 0;
    for(Sample s:samples){
      double val = forest.classify(s);
      sum += (val-s.label)*(val-s.label);
      System.out.println(val+" "+s.label);
    }
    System.out.println(sum/samples.size()+" "+sum);
    System.out.println(System.currentTimeMillis());
  }

}