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java.lang.Objectorg.mymedialite.itemrec.ItemRecommender
org.mymedialite.itemrec.KNN
org.mymedialite.itemrec.ItemKNN
org.mymedialite.itemrec.WeightedItemKNN
public class WeightedItemKNN
Weighted k-nearest neighbor item-based collaborative filtering using cosine similarity. This recommender does NOT support incremental updates.
Field Summary |
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Fields inherited from class org.mymedialite.itemrec.KNN |
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correlation, k, nearest_neighbors |
Fields inherited from class org.mymedialite.itemrec.ItemRecommender |
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feedback, maxItemID, maxUserID |
Constructor Summary | |
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WeightedItemKNN()
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Method Summary | |
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double |
predict(int user_id,
int item_id)
Predict the rating or score for a given user-item combination. |
java.lang.String |
toString()
Return a string representation of the recommender |
Methods inherited from class org.mymedialite.itemrec.ItemKNN |
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getItemSimilarity, getMostSimilarItems, train |
Methods inherited from class org.mymedialite.itemrec.KNN |
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loadModel, loadModel, saveModel, saveModel |
Methods inherited from class org.mymedialite.itemrec.ItemRecommender |
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canPredict, clone, getFeedback, setFeedback |
Methods inherited from class java.lang.Object |
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equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public WeightedItemKNN()
Method Detail |
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public double predict(int user_id, int item_id)
IRecommender
predict
in interface IRecommender
predict
in class ItemKNN
user_id
- the user IDitem_id
- the item ID
public java.lang.String toString()
IRecommender
toString
in interface IRecommender
toString
in class ItemKNN
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