/* * 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.mahout.math.random; import org.apache.mahout.common.RandomUtils; import java.util.Random; public final class Normal extends AbstractSamplerFunction { private final Random rand = RandomUtils.getRandom(); private double mean = 0; private double sd = 1; public Normal() {} public Normal(double mean, double sd) { this.mean = mean; this.sd = sd; } @Override public Double sample() { return rand.nextGaussian() * sd + mean; } }