[英]R: vectorized sample where the probability varies each time you sample
I'm trying to sample 10 values of either 0 or 1, with defined (but different) probabilities each time. 我正在尝试对10个0或1的值进行采样,每次都定义(但不同)概率。
This does not work: 这不起作用:
sample(0:1, size = 10, replace = T, prob = seq(0.1, 1, 0.1))
This does work: 这确实有效:
sapply(seq(0.1, 1, 0.1), function(x) sample(0:1, size = 1, prob = c(1-x, x)))
The 10th value is always 1, while the first value has a 1/10 chance of being a 1 - which is what I want to achieve. 第十个值始终为1,而第一个值具有1的1/10概率为1-这是我想要实现的。
Is there a vectorized approach? 有矢量化方法吗?
您想从二项分布中进行采样:
rbinom(10, 1, prob = seq(0.1, 1, 0.1))
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