JAVA - 指数分布

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时间:2020-11-02 14:33:29  来源:igfitidea点击:

JAVA - exponential distribution

javamathrandomexponential

提问by Ján Яab?an

I need to find formula for exponential distribution of probability, but i don′t know how to find it :( This formula have to have a powerful statistical properties(it can′t throw away any result from random to keep indistructed seek of random instance)

我需要找到概率指数分布的公式,但我不知道如何找到它:(这个公式必须具有强大的统计特性(它不能丢弃任何随机结果以保持随机实例的无序查找)

i am trying to find formula, which will work in method like this:

我正在尝试找到公式,它将以这样的方法工作:

rand.getNextDuobleExpDistrib();

I have this code for now, but according to "input analyser" it doesn′t work correctly

我现在有这个代码,但根据“输入分析器”它不能正常工作

public double getNext() {
        return -lampda * Math.log(rand.nextDouble());
 }

回答by Florian Prud'homme

You can see this answer : Pseudorandom Number Generator - Exponential Distribution

你可以看到这个答案:伪随机数生成器 - 指数分布

Here the java code

这里是java代码

public double getNext() {
    return  Math.log(1-rand.nextDouble())/(-lambda);
}

Have a nice day

祝你今天过得愉快