/*
* 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 com.mapr.stats.random;
import org.apache.mahout.math.jet.random.Normal;
import java.util.Random;
/**
* Returns a normal distribution whose mean is uniformly distributed on [0,1) and whose sd is as
* specified.
*/
public class NormalDistributionSampler extends DistributionGenerator {
private double sd;
private Random gen;
public NormalDistributionSampler(double sd, Random gen) {
this.sd = sd;
this.gen = gen;
}
@Override
public DistributionWithMean nextDistribution() {
double mean = gen.nextDouble();
return new DistributionWithMean(new Normal(mean, sd, gen), mean);
}
}