另一个base R解决方案——您可以使用递归函数来实现这一点:
list1 <- list(ts(1:100),
list(1:19,
factor(letters)))
list2 <- list(list(list(ts(1:100), data.frame(a= rnorm(100))),
matrix(rnorm(10))),
NA)
recursive_fun <- function(my_list) {
if (inherits(my_list, 'list')) {
Recall(my_list[[1]])
} else {
my_list
}
}
输出:
> recursive_fun(list1)
Time Series:
Start = 1
End = 100
Frequency = 1
[1] 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
[31] 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60
[61] 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90
[91] 91 92 93 94 95 96 97 98 99 100
> recursive_fun(list2)
Time Series:
Start = 1
End = 100
Frequency = 1
[1] 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
[31] 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60
[61] 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90
[91] 91 92 93 94 95 96 97 98 99 100