从向量生成R中所有长度的所有组合 [英] Generate all combinations, of all lengths, in R, from a vector

问题描述

假设我有向量 [ a， b， c] ，那么我想创建所有<各种大小的strong>独特组合（顺序无关紧要）：

Suppose I have the vector ["a","b","c"], then I'd like to create a list of vectors of all the unique combinations, of all sizes (order does not matter):

["a"]
["b"]
["c"]
["a","b"]
["a","c"]
["b","c"]
["a","b","c"]

如何在R中执行此操作？

How can I do this in R?

推荐答案

我们可以尝试使用 combn

do.call("c", lapply(seq_along(v1), function(i) combn(v1, i, FUN = list)))

数据

data

v1 <- letters[1:3]

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