生成Java中遵循正态分布的数字

Question

我想生成数字（随机），使得数字遵循给定均值和方差的正态分布。我怎样才能做到这一点？

如果您可以在Java环境中使用它会更好。 有人可能会在这些答案中寻找帮助：但它们并不精确。 Generate random numbers following a normal distribution in C/C++

Answer 1

无耻一派，摘自：http://www.javapractices.com/topic/TopicAction.do?Id=62

的“魔力” happend内Random.nextGaussian()

import java.util.Random; 

/** 
Generate pseudo-random floating point values, with an 
approximately Gaussian (normal) distribution. 

Many physical measurements have an approximately Gaussian 
distribution; this provides a way of simulating such values. 
*/ 
public final class RandomGaussian { 

    public static void main(String... aArgs){ 
    RandomGaussian gaussian = new RandomGaussian(); 
    double MEAN = 100.0f; 
    double VARIANCE = 5.0f; 
    for (int idx = 1; idx <= 10; ++idx){ 
     log("Generated : " + gaussian.getGaussian(MEAN, VARIANCE)); 
    } 
    } 

    private Random fRandom = new Random(); 

    private double getGaussian(double aMean, double aVariance){ 
    return aMean + fRandom.nextGaussian() * aVariance; 
    } 

    private static void log(Object aMsg){ 
    System.out.println(String.valueOf(aMsg)); 
    } 
}