R:将嵌套列表转换为一级列表 [英] R : Convert nested list into a one level list

问题描述

我得到了以下y嵌套列表:

I got the following y nested list :

x1=c(12,54,2)
x2=c(2,88,1)
x3=c(4,8)

y=list()
y[[1]]=x1
y[[2]]=list(x2,x3)

y
[[1]]
[1] 12 54  2

[[2]]
[[2]][[1]]
[1]  2 88  1

[[2]][[2]]
[1] 4 8

我想从此嵌套列表中提取所有元素，并将它们放入一个一级列表中，所以我的预期结果应该是:

I would like to extract all elements from this nested list and put them into a one level list, so my expected result should be :

y_one_level_list
[[1]]
[1] 12 54  2

[[2]]
[1]  2 88  1

[[3]]
[1] 4 8

显然，一个真正的问题涉及更深层的嵌套列表，您将如何解决呢?我试过了，但失败了.

Obviously ma real problem involve a deeper nested list, how would you solve it? I tried rapply but I failed.

推荐答案

与rapply一起尝试lapply:

lapply(rapply(y, enquote, how="unlist"), eval)

#[[1]]
#[1] 12 54  2

#[[2]]
#[1]  2 88  1

#[[3]]
#[1] 4 8

它也适用于更深的列表.

It does work for deeper lists either.

这篇关于R:将嵌套列表转换为一级列表的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！