如何偏置一个随机数发生器 [英] how to bias a random number generator

问题描述

我使用随stl c ++提供的随机数生成器。我们如何偏好它，以便产生更小的随机数，其概率大于更大的随机数。

i am using the random number generator provided with stl c++. how do we bias it so that it produces smaller random numbers with a greater probability than larger random numbers.

推荐答案

case你可能想要一个概率分布。你可以从一个均匀的随机数生成器生成任何分布，问题只是它应该是什么样子。 拒绝抽样是生成难以描述的分布的常见方法，但在您的情况下，更简单的可能就足够了。

Well, in this case you probably would like a certain probability distribution. You can generate any distribution from a uniform random number generator, the question is only how it should look like. Rejection sampling is a common way of generating distributions that are hard to describe otherwise, but in your case something simpler might suffice.

您可以查看这篇文章用于许多常见的分布函数。 Chi ， Chi-Square 和指数看起来很不错。

You can take a look at this article for many common distribution functions. Chi, Chi-Square and Exponential look like good candidates.

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