Start line:  
End line:  

Snippet Preview

Snippet HTML Code

Stack Overflow Questions
Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
package org.apache.mahout.cf.taste.similarity;

Implementations of this interface define a notion of similarity between two items. Implementations should return values in the range -1.0 to 1.0, with 1.0 representing perfect similarity.

See also:
UserSimilarity
public interface ItemSimilarity extends Refreshable {

  

Returns the degree of similarity, of two items, based on the preferences that users have expressed for the items.

Parameters:
itemID1 first item ID
itemID2 second item ID
Returns:
similarity between the items, in [-1,1]
Throws:
org.apache.mahout.cf.taste.common.TasteException if an error occurs while accessing the data
  double itemSimilarity(long itemID1long itemID2throws TasteException;
New to GrepCode? Check out our FAQ X