Collective Intelligence reading notes

chapter1： introduce

chapter2：Making Recommendation

Euclidean Distance Score

Pearson Correlation Score

   

计算后进行排序，可得到最相似的推荐排名。

There are many other functions
such as the Jaccard coefficient or Manhattan distance that you can use as your similarity
function, as long as they have the same signature and return a float where a higher
value means more similar.