| /* |
| * 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.commons.math.stat.ranking; |
| |
| /** |
| * Interface representing a rank transformation. |
| * |
| * @since 2.0 |
| * @version $Revision: 811685 $ $Date: 2009-09-05 19:36:48 +0200 (sam. 05 sept. 2009) $ |
| */ |
| public interface RankingAlgorithm { |
| /** |
| * <p>Performs a rank transformation on the input data, returning an array |
| * of ranks.</p> |
| * |
| * <p>Ranks should be 1-based - that is, the smallest value |
| * returned in an array of ranks should be greater than or equal to one, |
| * rather than 0. Ranks should in general take integer values, though |
| * implementations may return averages or other floating point values |
| * to resolve ties in the input data.</p> |
| * |
| * @param data array of data to be ranked |
| * @return an array of ranks corresponding to the elements of the input array |
| */ |
| double[] rank (double[] data); |
| } |