How to populate new variable with repeated values from vector?

Question

I have a vector of values:

    values = c(22, 42, 243)

I have a variable in a dataframe:

    df$variable = 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3

如何在数据帧中的新变量中将值向量中的每个值重复n次，从而得到以下信息：

    df$new_variable = 22, 22, 22, 22, 42, 42, 42, 42, 243, 243, 243, 243

Answer 1

最简单的方法是使用sapply：

sapply(variable, function(x) df$values[x])

嗯...甚至还有一个更简单的解决方案：

values[df$variable]