/**
* 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.math.hadoop.similarity.cooccurrence.measures;
import org.apache.mahout.math.Vector;
public interface VectorSimilarityMeasure {
double NO_NORM = 0.0;
Vector normalize(Vector vector);
double norm(Vector vector);
double aggregate(double nonZeroValueA, double nonZeroValueB);
double similarity(double summedAggregations, double normA, double normB, int numberOfColumns);
boolean consider(int numNonZeroEntriesA, int numNonZeroEntriesB, double maxValueA, double maxValueB,
double threshold);
}