sklearn学习内容中不同模型在预测脸部下半部分的效果比较

 # 预测脸的下半部分

    
 import numpy as np
    
 import matplotlib.pyplot as plt
    
  
    
 from sklearn.datasets import fetch_olivetti_faces
    
 from sklearn.utils.validation import check_random_state
    
  
    
 from sklearn.ensemble import ExtraTreesRegressor
    
 from sklearn.neighbors import KNeighborsRegressor
    
 from sklearn.linear_model import LinearRegression
    
 from sklearn.linear_model import RidgeCV
    
  
    
 data = fetch_olivetti_faces()
    
 targets = data.target
    
  
    
 print data.images
    
  
    
 data = data.images.reshape((len(data.images), -1))