Lucy (Skillet song) Lucy (Skillet song) "Lucy" is the fifth single of the 2009 album "Awake" by the Christian rock band Skillet, and is the twelfth and final track on the album. John Cooper initially refrained from discussing the song's full meaning, stating that it has "a gist of regret where you wish you had done things differently" and "even though there's a specific story, it has a lot of interpretations that have kind of meant a lot to a lot of people already." In November 2010, at a concert at the Target Center in Minneapolis, Cooper revealed it is about a young
Item-item collaborative filtering is analogous to "people who rate item X highly, like you, also tend to rate item Y highly, and you haven't rated item Y yet, so you should try it". Item-item collaborative filtering had less error than user-user collaborative filtering. In addition, its less-dynamic model was computed less often and stored in a smaller matrix, so item-item system performance was better than user-user systems. Slope One is a family of item-item collaborative filtering algorithms designed to reduce model overfitting problems. Item-item collaborative filtering Item-item collaborative filtering, or item-based, or item-to-item, is a form of collaborative filtering for recommender systems based