附加两个列表列表的列表

Question

我有两个列表如下：

list1 <- list(c(`0` = 0L, `25` = 0L, `100` = 1L, `250` = 1L, `500` = 1L, 
                `1000` = 1L, Infinity = 3L), c(`0` = 0L, `25` = 0L, `100` = 1L, 
                                               `250` = 1L, `500` = 1L, Infinity = 4L))

list2 <- list(c(`0` = 0L, `25` = 0L, `100` = 0L, `250` = 2L, `500` = 1L, 
                `1000` = 1L, Infinity = 3L), c(`0` = 0L, `25` = 0L, `100` = 1L, 
                                               `250` = 1L, `500` = 1L, Infinity = 4L))

我想将 list2[[1]] 附加到 list1[[1]] 并将 list2[[2]] 附加到 list1[[2]]。这样：

list_out <- list(c(`0` = 0L, `25` = 0L, `100` = 1L, `250` = 1L, `500` = 1L, 
                `1000` = 1L, Infinity = 3L, `0` = 0L, `25` = 0L, `100` = 0L, `250` = 2L, `500` = 1L, 
                `1000` = 1L, Infinity = 3L), c(`0` = 0L, `25` = 0L, `100` = 1L, 
                                               `250` = 1L, `500` = 1L, Infinity = 4L, `0` = 0L, `25` = 0L, `100` = 1L, 
                                               `250` = 1L, `500` = 1L, Infinity = 4L))

谁能帮我解释一下我应该怎么做？

Answer 1

您可以使用 lapply 和 c()。

lapply(1:length(list1), function(x) c(list1[[x]], list2[[x]]))

或mapply与append或c:

mapply(append, list1, list2)

输出

[[1]]
       0       25      100      250      500     1000 Infinity        0 
       0        0        1        1        1        1        3        0 
      25      100      250      500     1000 Infinity 
       0        0        2        1        1        3 

[[2]]
       0       25      100      250      500 Infinity        0       25 
       0        0        1        1        1        4        0        0 
     100      250      500 Infinity 
       1        1        1        4

检查它是否与您的相同list_out:

identical(lapply(1:length(list1), function(x) c(list1[[x]], list2[[x]])), list_out)
[1] TRUE

identical(mapply(append, list1, list2), list_out)
[1] TRUE

Answer 2

你可以使用基础函数append:

> append(list1[[1]], list2[[1]])
       0       25      100      250      500     1000 Infinity        0       25      100 
       0        0        1        1        1        1        3        0        0        0 
     250      500     1000 Infinity 
       2        1        1        3 
>   append(list1[[2]], list2[[2]])
       0       25      100      250      500 Infinity        0       25      100      250 
       0        0        1        1        1        4        0        0        1        1 
     500 Infinity 
       1        4

Answer 3

这是另一个基本的 R 解决方案。

Map(c, list1, list2)

identical(Map(c, list1, list2), list_out)
#[1] TRUE

Answer 4

另一种选择是map2

library(purrr)
map2(list1, list2, c)

附加两个列表列表的列表

Appending the lists of two lists of lists

r

list

append

lapply

输出