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Agglomerative hierarchical clustering analysis and visualization implemented in Java
/*******************************************************************************
* Copyright 2013 Lars Behnke
*
* Licensed 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 com.apporiented.algorithm.clustering;
import java.util.Collection;
public class AverageLinkageStrategy implements LinkageStrategy {
@Override
public Distance calculateDistance(Collection distances) {
double sum = 0;
double result;
for (Distance dist : distances) {
sum += dist.getDistance();
}
if (distances.size() > 0) {
result = sum / distances.size();
} else {
result = 0.0;
}
return new Distance(result);
}
}