loglossboosttest.java

Boosting算法软件包

/*
 * Created on Dec 29, 2003
 */
package jboost.booster;

import jboost.examples.Label;

/**
 * @author cschavis
 */
public class LogLossBoostTest extends AbstractBoosterTest {
  
  LogLossBoost m_logLoss;
            
  /**
   * @param arg0
   */
  public LogLossBoostTest(String arg0) {
    super(arg0);
    // TODO Auto-generated constructor stub
  }


  /*
   * @see TestCase#setUp()
   */
  protected void setUp() throws Exception {
    m_odd= new LogLossBoost();
    m_even= new LogLossBoost();
    m_allTrue= new LogLossBoost();
    m_allFalse= new LogLossBoost();
    m_solitaires= new LogLossBoost[COUNT];
    for (int i=0; i < COUNT; i++) {
      m_solitaires[i]= new LogLossBoost();
    }
    super.setUp();
    m_logLoss= new LogLossBoost();
  }
  
  
  public final void testFinalizeData() {
    //TODO Implement finalizeData().
  }

  public final void testUpdate() {
    //TODO Implement update().
    // fill in booster
    int[] indices= new int[COUNT];
    int[] ones= new int[COUNT/2];
    int[] zeroes= new int[COUNT/2];
    for (int i=0; i < COUNT/2; i++) {
      m_logLoss.addExample(i, new Label(0));
      indices[i]= i;
      zeroes[i]= i;
    }
    for (int i=COUNT/2, j=0; i < COUNT; i++, j++) {
      m_logLoss.addExample(i, new Label(1));
      indices[i]= i;
      ones[j]= i;
    }
    m_logLoss.finalizeData();
    for (int i=0; i < zeroes.length; i++) {
      zeroes[i]= indices[COUNT/2 + i];
      Prediction p1= m_logLoss.getPrediction(m_logLoss.newBag(zeroes));
      m_logLoss.update(new Prediction[] {p1}, new int[][] {zeroes});
      for (int j=0; j < zeroes.length; j++) {
        int index= zeroes[j];
        double weight= m_logLoss.m_weights[index];
        double margin= m_logLoss.m_margins[index];
        assertEquals(weight, 1/(1 + Math.exp(margin)), 0.00001);
      }
    }
    
    for (int i=0; i < ones.length; i++) {
      ones[i]= indices[COUNT/2 + i];
      Prediction p1= m_logLoss.getPrediction(m_logLoss.newBag(ones));
      m_logLoss.update(new Prediction[] {p1}, new int[][] {ones});
      for (int j=0; j < ones.length; j++) {
        int index= ones[j];
        double weight= m_logLoss.m_weights[index];
        double margin= m_logLoss.m_margins[index];
        assertEquals(weight, 1/(1 + Math.exp(margin)), 0.00001);
      }
    }
  }

  public final void testGetBound() {
    //TODO Implement getBound().
  }

}