| /* |
| * 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 opennlp.tools.fca; |
| |
| import java.util.Random; |
| |
| public class RandomNoiseGenerator { |
| |
| public int [][] AlterCellsWithProbability(double p, int [][] binaryContext){ |
| |
| Random rnd = new Random(); |
| int n = binaryContext.length; |
| int m = binaryContext[0].length; |
| |
| for (int i = 0; i < n; i++ ) |
| for (int j = 0; j < m; j++) |
| if (rnd.nextFloat() <= p){ |
| if (binaryContext[i][j] == 0) |
| binaryContext[i][j] = 1; |
| else |
| binaryContext[i][j] = 0; |
| } |
| return binaryContext; |
| } |
| |
| public int[][] AddObjectsAttributesWithProbability(int numberObjAttr, double d, int [][] binaryContext){ |
| |
| Random rnd = new Random(); |
| int nRandObjs = rnd.nextInt(numberObjAttr); |
| int nRandAttr = numberObjAttr - nRandObjs; |
| |
| int [][] newBinaryContext = new int [binaryContext.length + nRandObjs][binaryContext[0].length + nRandAttr]; |
| for (int i = 0; i < binaryContext.length; i++) |
| for (int j = 0; j < binaryContext[0].length; j++) |
| newBinaryContext[i][j] = binaryContext[i][j]; |
| |
| for (int i = binaryContext.length; i < binaryContext.length + nRandObjs; i++) |
| for (int j = 0; j < binaryContext[0].length + nRandAttr; j++) |
| newBinaryContext[i][j] = (rnd.nextFloat() <= d) ? 1 : 0; |
| |
| for (int j = binaryContext[0].length; j < binaryContext[0].length + nRandAttr; j++) |
| for (int i = 0; i < binaryContext.length; i++) |
| newBinaryContext[i][j] = (rnd.nextFloat() <= d) ? 1 : 0; |
| |
| return newBinaryContext; |
| } |
| } |
| |
| |