| /* |
| * 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.math4.legacy.linear; |
| |
| /** |
| * This is an implementation of {@link UnmodifiableRealVectorAbstractTest} for |
| * unmodifiable views of {@link OpenMapRealVector}. |
| * |
| */ |
| public class UnmodifiableOpenMapRealVectorTest |
| extends UnmodifiableRealVectorAbstractTest { |
| /** To ensure sufficient sparsity. */ |
| public static final double PROBABILITY_OF_ZERO = 0.5; |
| |
| /** |
| * Returns a random vector of type {@link ArrayRealVector}. |
| * |
| * @return a new random {@link ArrayRealVector}. |
| */ |
| @Override |
| public RealVector createVector() { |
| OpenMapRealVector v = new OpenMapRealVector(DIM, EPS); |
| for (int i = 0; i < DIM; i++) { |
| if (RANDOM.nextDouble() > PROBABILITY_OF_ZERO) { |
| v.setEntry(i, RANDOM.nextDouble()); |
| } |
| } |
| return v; |
| } |
| } |