选择特定数字的可能性 [英] Choose specific number with probability

问题描述

如何选择具有特定概率p的数字?

How can one choose a number with a specific probability p?

假设我们必须在{0, 1}和概率p代表选择1之间进行选择.

Say we must choose between {0, 1} and the probability p stands for choosing 1.

因此，当p=0.8时，我们选择80％的1和20％的0.

So when p=0.8 we choose 1 with 80% and 0 with 20%.

R中有一个简单的解决方案吗?

Is there a simple solution in R for this?

推荐答案

看看从帮助文件中，您可以阅读:

From the helpfile you can read:

sample使用或不使用替换从x的元素中获取指定大小的样本.

sample takes a sample of the specified size from the elements of x using either with or without replacement.

和sample中的参数prob充当...

and the argument prob in sample acts as ...

一个概率权重向量，用于获取要采样的向量的元素.

A vector of probability weights for obtaining the elements of the vector being sampled.

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