| /* |
| * 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; |
| |
| /** |
| * Strategies for handling NaN values in rank transformations. |
| * <ul> |
| * <li>MINIMAL - NaNs are treated as minimal in the ordering, equivalent to |
| * (that is, tied with) <code>Double.NEGATIVE_INFINITY</code>.</li> |
| * <li>MAXIMAL - NaNs are treated as maximal in the ordering, equivalent to |
| * <code>Double.POSITIVE_INFINITY</code></li> |
| * <li>REMOVED - NaNs are removed before the rank transform is applied</li> |
| * <li>FIXED - NaNs are left "in place," that is the rank transformation is |
| * applied to the other elements in the input array, but the NaN elements |
| * are returned unchanged.</li> |
| * </ul> |
| * |
| * @since 2.0 |
| * @version $Revision: 811685 $ $Date: 2009-09-05 19:36:48 +0200 (sam. 05 sept. 2009) $ |
| */ |
| public enum NaNStrategy { |
| |
| /** NaNs are considered minimal in the ordering */ |
| MINIMAL, |
| |
| /** NaNs are considered maximal in the ordering */ |
| MAXIMAL, |
| |
| /** NaNs are removed before computing ranks */ |
| REMOVED, |
| |
| /** NaNs are left in place */ |
| FIXED |
| } |