合并列表的同一列表中的行

Combine rows within the same list of a list

我有一个包含两个列表的列表,其中第一个包含三个元素,第二个包含两个元素。我想对同一列表中的元素进行行组合。以下是一些数据:

list1 <- list(a = c(1,2,3), b = c(4,5,6)) #the first nested list which has three elements
list2 <- list(a = c(2,4), b = c(5,6)) #the second nested list which has two elements
alllist<- list(list1, list2) #the combo list that nests list1 and list2

最后,我只是将 alllist 转换为如下所示的列表:

[[1]]
[1] 1 2 3
[1] 4 5 6

[[2]]
[1] 2 4
[1] 5 6

循环 listrbind

lapply(alllist, \(x) do.call(rbind, unname(x)))

-输出

[[1]]
     [,1] [,2] [,3]
[1,]    1    2    3
[2,]    4    5    6

[[2]]
     [,1] [,2]
[1,]    2    4
[2,]    5    6

或者可以使用simplify2array

lapply(alllist, simplify2array)

您想要二维 structure/array 还是简单地连接 a 和 b 列表中的值?如果是后者:

lapply(alllist, function(x) unname(unlist(x)))

[[1]]
[1] 1 2 3 4 5 6

[[2]]
[1] 2 4 5 6

一种基于purrr::mapdplyr::bind_rows的方法,其灵感来自@akrun第一个解决方案:

library(tidyverse)

alllist %>% map(~ bind_rows(.x) %>% unname %>% t) 

#> [[1]]
#>      [,1] [,2] [,3]
#> [1,]    1    2    3
#> [2,]    4    5    6
#> 
#> [[2]]
#>      [,1] [,2]
#> [1,]    2    4
#> [2,]    5    6