java实现随机森林RandomForest的示例代码

/**
 * 随机森林 回归问题
 * @author ysh  1208706282
 *
 */
publicclassRandomForest {
  List mSamples;
  List mCarts;
  doublemFeatureRate;
  intmMaxDepth;
  intmMinLeaf;
  Random mRandom;
  /**
   * 加载数据  回归树
   * @param path
   * @param regex
   * @throws Exception
   */
  publicvoidloadData(String path,String regex)throwsException{
    mSamples =newArrayList();
    BufferedReader reader =newBufferedReader(newFileReader(path));
    String line =null;
    String splits[] =null;
    Sample sample =null;
    while(null!= (line=reader.readLine())){
      splits = line.split(regex);
      sample =newSample();
      sample.label = Double.valueOf(splits[0]);
      sample.feature =newArrayList(splits.length-1);
      for(inti=0;i(iters);
    Cart cart =null;
    for(intiter=0;iter s =newArrayList(mSamples.size());
      for(inti=0;i samples = Cart.loadTestData("F:/2016-contest/20161001/valid_data_1.csv",true,",");
    doublesum =0;
    for(Sample s:samples){
      doubleval = 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());
  }
 
}