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How to combine this list of vectors by elements names ?
L1 <- list(F01=c(1,2,3,4),F02=c(10,20,30),F01=c(5,6,7,8,9),F02=c(40,50))
So to get :
results <- list(F01=c(1,2,3,4,5,6,7,8),F02=c(10,20,30,40,50))
I tried to apply the following solution merge lists by elements names but I can't figure out how to adapt this to my situation.
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Using append() function One simple and popular way to merge(join) two lists in Python is using the in-built append() method of python. The append() method in python adds a single item to the existing list. It doesn't return a new list of items.
R provided two inbuilt functions named c() and append() to combine two or more lists. c() function in R language accepts two or more lists as parameters and returns another list with the elements of both the lists.
Two or more R lists can be joined together. For that purpose, you can use the append , the c or the do. call functions. When combining the lists this way, the second list elements will be appended at the end of the first list.
sapply(unique(names(L1)), function(x) unname(unlist(L1[names(L1)==x])), simplify=FALSE)
$F01
[1] 1 2 3 4 5 6 7 8 9
$F02
[1] 10 20 30 40 50
You can achieve the same result using map function from purrr
map(unique(names(L1)), ~ flatten_dbl(L1[names(L1) == .x])) %>%
set_names(unique(names(L1)))
The first line transforms the data by merging elements with matching names, while the last line renames new list accordingly.
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