/*******************************************************************************
* Copyright (c) 2010 Haifeng Li
*
* 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 smile.validation;
/**
* An abstract interface to measure the clustering performance.
*
* @author Haifeng Li
*/
public interface ClusterMeasure {
/**
* Returns an index to measure the quality of clustering.
* @param y1 the cluster labels.
* @param y2 the alternative cluster labels.
*/
public double measure(int[] y1, int[] y2);
}