2013年4月17日
皮尔逊相关度评价(Pearson correlation Score)
摘要： 1 def sim_pearson(prefs, person1, person2): 2 si = {} 3 4 for it in prefs[person1]: 5 if it in prefs[person2]: 6 si[it] = 1 7 8 n = len(si) 9 if n == 0: return 010 11 sum1 = sum([prefs[person1][it] for it in si])12 sum2 = sum([prefs[person2][it] for it ... 阅读全文
posted @ 2013-04-17 14:23 Functional Life 阅读(579) 评论(0) 推荐(0)
欧几里得距离评价(Euclidean Distance Score)
摘要： recommendations.pycritics = { 'Lisa Rose' : {'Lady in the Water' : 2.5, 'Snakes on a Plane' : 3.5, 'Just My Luck' : 3.0, 'Superman Returns' : 3.5, 'You, Me and Dupree' : 2.5, 'The Night Listener' : 3.0}, 'Gene Seymour' : {'Lady in t 阅读全文
posted @ 2013-04-17 11:00 Functional Life 阅读(460) 评论(0) 推荐(0)