finds 算法

实现《机器学习》19页的FIND-S算法。

验证不同的实例顺序

开始于非最特殊假设。

#__author__=lx
#__date__=2011.10.18
#__brief__=FIND-S, from 'machine learning' 19

def find_s():
        
        x1 = [ 'sunny', 'warm', 'nurmal', 'strong', 'warm', 'same' , 1 ]
        x2 = [ 'sunny', 'warm', 'high', 'strong', 'warm', 'same' , 1 ]
        x3 = [ 'rainy', 'cold', 'high', 'strong', 'warm', 'change', 0 ]
        x4 = [ 'sunny', 'warm', 'high', 'strong', 'cool', 'change', 1 ]

        h = [ None, None, None, None, None, None ]
        h1 = [ 'sunny', 'cold', 'high', 'strong', 'warm', 'change' ]

        xa = [ x1, x2, x3, x4 ]
        
        xb = [ x2, x3, x4, x1 ]

        for i in xb:
                if i[6] == 1:
                        index = 0
                        for j in i[ :-1 ]:
                                if ( h1[index] == None ):
                                        h1[index] = j
                                elif ( h1[index] != j ):
                                        h1[index] = '?'
                                index += 1

        for i in h1:
                print i
                                
                                        


if __name__ == "__main__":
        find_s();