I need help in how to manage lists in an iterative way.
I have the following list list which is composed of several dataframes with same columns, but different number of rows. Example:
[[1]]
id InpatientDays ERVisits OfficeVisits Narcotics
1 a 0 0 18 1
2 b 1 1 6 1
3 c 0 0 5 3
4 d 0 1 19 0
5 e 8 2 19 3
6 f 2 0 9 2
[[2]]
id InpatientDays ERVisits OfficeVisits Narcotics
7 a 16 1 8 1
8 b 2 0 8 0
9 c 2 1 4 3
10 d 4 2 0 2
11 e 6 5 20 2
12 a 0 0 7 4
I would like to apply a function to get all the possible combinations for the id for each "data frame" in the list.
I intended to try something like this lapply(list1, function(x) combn(unique(list1[x]$id))) Which of course does not work.. expecting to get something like:
[[1]]
[,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] [,11] [,12] [,13] [,14] [,15]
[1,] "a" "a" "a" "a" "a" "b" "b" "b" "b" "c" "c" "c" "d" "d" "e"
[2,] "b" "c" "d" "e" "f" "c" "d" "e" "f" "d" "e" "f" "e" "f" "f"
[[2]]
[,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10]
[1,] "a" "a" "a" "a" "b" "b" "b" "c" "c" "d"
[2,] "b" "c" "d" "e" "c" "d" "e" "d" "e" "e"
Is this possible? I know for sure this works for a single dataframe df
combn(unique(df$id),2)