8e958d70fa54c0b249f7e6de27fd57cbaa7563d4,algorithm/rating/SlopeOne.py,SlopeOne,computeAverage,#SlopeOne#,14

Before Change

                new_x1,new_x2 = qmath.common(self.dao.testSet_i.keys()[i1],i2)
                diff = new_x1 - new_x2

                diffAverage_sub.setdefault(i2,diff.mean())
                freq_sub.setdefault(i2,len(diff))

            self.diffAverage[i1] = diffAverage_sub
            self.freq[i1] = freq_sub

After Change

            for item2 in self.dao.item:
                new_x1,new_x2 = qmath.common(self.dao.col(item),self.dao.col(item2))
                diff = new_x1 - new_x2
                if len(diff)==0:
                    diffAverage_sub.setdefault(self.dao.item[item2], 0)
                else:
                    diffAverage_sub.setdefault(self.dao.item[item2],diff.mean())
                freq_sub.setdefault(self.dao.item[item2],len(diff))

            self.diffAverage[item] = diffAverage_sub
            self.freq[item] = freq_sub

Instances