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/**
* 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.clustering.fuzzykmeans;
import org.apache.mahout.clustering.kmeans.Kluster;
import org.apache.mahout.common.distance.DistanceMeasure;
import org.apache.mahout.math.Vector;
import org.apache.mahout.math.VectorWritable;
public class SoftCluster extends Kluster {
// For Writable
public SoftCluster() {}
/**
* Construct a new SoftCluster with the given point as its center
*
* @param center
* the center point
* @param measure
* the DistanceMeasure
*/
public SoftCluster(Vector center, int clusterId, DistanceMeasure measure) {
super(center, clusterId, measure);
}
@Override
public String asFormatString() {
return this.getIdentifier() + ": "
+ this.computeCentroid().asFormatString();
}
@Override
public String getIdentifier() {
return (isConverged() ? "SV-" : "SC-") + getId();
}
@Override
public double pdf(VectorWritable vw) {
// SoftCluster pdf cannot be calculated out of context. See
// FuzzyKMeansClusterer
throw new UnsupportedOperationException(
"SoftCluster pdf cannot be calculated out of context. See FuzzyKMeansClusterer");
}
}
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