1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18 package org.apache.commons.math4.legacy.linear; 19 20 /** 21 * This is an implementation of {@link UnmodifiableRealVectorAbstractTest} for 22 * unmodifiable views of {@link OpenMapRealVector}. 23 * 24 */ 25 public class UnmodifiableOpenMapRealVectorTest 26 extends UnmodifiableRealVectorAbstractTest { 27 /** To ensure sufficient sparsity. */ 28 public static final double PROBABILITY_OF_ZERO = 0.5; 29 30 /** 31 * Returns a random vector of type {@link ArrayRealVector}. 32 * 33 * @return a new random {@link ArrayRealVector}. 34 */ 35 @Override 36 public RealVector createVector() { 37 OpenMapRealVector v = new OpenMapRealVector(DIM, EPS); 38 for (int i = 0; i < DIM; i++) { 39 if (RANDOM.nextDouble() > PROBABILITY_OF_ZERO) { 40 v.setEntry(i, RANDOM.nextDouble()); 41 } 42 } 43 return v; 44 } 45 }