Combine two lists in a dataframe in R

Question

I have two lists with different structure:

listA <- list(c(\"a\",\"b\",\"c\"), c(\"d\",\"e\"))
listB <- list(0.05, 0.5)

listA
[[1]]
[1] \"a\" \"b\" \"c\"
         


        

Answer 1

If looking for a tidyverse solution, here is the analogue to the accepted answer. Using the dfr suffix to the map function family enables a very simple solution which should also be faster than do.call("rbind").

library(tidyverse)
listA <- list(c("a","b","c"), c("d","e"))
listB <- list(0.05, 0.5)

map2_dfr(listA, listB, ~ tibble(A = .x, B = .y))
#> # A tibble: 5 x 2
#>   A         B
#>    
#> 1 a      0.05
#> 2 b      0.05
#> 3 c      0.05
#> 4 d      0.5 
#> 5 e      0.5

^{Created on 2019-02-12 by the reprex package (v0.2.1)}