Chapter 5. Ensemble Modeling
Note
Learning Objectives
By the end of the chapter, you will be able to:
- Explain the concepts of bias and variance and how they lead to underfitting and overfitting 
- Explain the concepts behind bootstrapping 
- Implement a bagging classifier using decision trees 
- Implement adaptive boosting and gradient boosting models 
- Implement a stacked ensemble using a number of classifiers 
Note
This chapter covers bias and variance, and underfitting and overfitting, and then introduces ensemble modeling.
 
                                             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
     
         
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                