combine list elements based on element names

Question

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))

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Answer 1

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.