content: /*
   * Tencent is pleased to support the open source community by making Angel available.
   *
   * Copyright (C) 2017-2018 THL A29 Limited, a Tencent company. All rights reserved.
   *
   * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
   * compliance with the License. You may obtain a copy of the License at
   *
   * https://opensource.org/licenses/Apache-2.0
   *
   * Unless required by applicable law or agreed to in writing, software distributed under the License
   * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
   * or implied. See the License for the specific language governing permissions and limitations under
   * the License.
   *
   */
  
  package com.tencent.angel.spark.ml.tree.param;
  
  import java.io.Serializable;
  
  public abstract class TreeParam implements Serializable {
  
    public int numFeature;  // number of features
    public int maxDepth;  // maximum depth
    public int maxNodeNum;  // maximum node num
    public int numSplit;  // number of candidate splits
    public int numWorker;  // number of workers
    //public float insSampleRatio;  // subsample ratio for instances
    public float featSampleRatio;  // subsample ratio for features
  
    @Override
    public String toString() {
      StringBuilder sb = new StringBuilder();
      sb.append(String.format("|numFeature = %d\n", numFeature));
      sb.append(String.format("|maxDepth = %d\n", maxDepth));
      sb.append(String.format("|maxNodeNum = %d\n", maxNodeNum));
      sb.append(String.format("|numSplit = %d\n", numSplit));
      sb.append(String.format("|numWorker = %d\n", numWorker));
      sb.append(String.format("|featSampleRatio = %f\n", featSampleRatio));
      return sb.toString();
    }
  }
  