Oggy Oggy Oggy other side of the River Tamar. "Oggy" is a slang term for a Cornish pasty, derived from its Cornish name, ""hoggan"", and was used by local Devon and Cornish sailors at the Devonport Dockyard in reference to pasty sellers who once stood outside the gates. The Devonport marines are still associated with the song which they generally sing at public displays. Tin-miners' wives or pasty sellers supposedly shouted ""Oggy Oggy Oggy"" – the response from any hungry miner or labourer would be "Oi!, Oi!, Oi!." The chant is also the chorus of a folk song and has always been heard
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