org.apache.mahout.cf.taste.eval.IRStatistics Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of mahout-mr Show documentation
Show all versions of mahout-mr Show documentation
Scalable machine learning libraries
/**
* 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.eval;
/**
*
* Implementations encapsulate information retrieval-related statistics about a
* {@link org.apache.mahout.cf.taste.recommender.Recommender}'s recommendations.
*
*
*
* See Information retrieval.
*
*/
public interface IRStatistics {
/**
*
* See Precision.
*
*/
double getPrecision();
/**
*
* See Recall.
*
*/
double getRecall();
/**
*
* See Fall-Out.
*
*/
double getFallOut();
/**
*
* See F-measure.
*
*/
double getF1Measure();
/**
*
* See F-measure.
*
*/
double getFNMeasure(double n);
/**
*
*/
double getNormalizedDiscountedCumulativeGain();
/**
* @return the fraction of all users for whom recommendations could be produced
*/
double getReach();
}
© 2015 - 2024 Weber Informatics LLC | Privacy Policy