How can I create multiple matrices or dataframes from a list in R?

Question

I have a list like this:

[[1]]
[1] "Vigia"                      "PA"                         "1508209"                   
[4] "Viseu"                      "PA"                         "1508308"                   

[[2]]
[1] "Abaetetuba"                 "PA"                         "1500107"                   
[4] "Acara"                      "PA"                         "1500206"

and I want to make two matrices like this:

                           [,1]                       [,2]                          [,3] 
[1,]                      Vigia                         PA                       1508209
[2,]                      Viseu                         PA                       1508308

                           [,1]                       [,2]                          [,3] 
[1,]                 Abaetetuba                         PA                       1500107
[2,]                      Acara                         PA                       1508308

I've tried to use

for(i in 1:2){
  output[i] <- matrix(unlist(A[[i]]), ncol = 3, byrow = TRUE)
}

But it's not working. I also tried to transform that list to a dataframe, but I couldn't.

Answer 1

Edit:

corrected my answer so it uses a loop:

li <- list(c( "Vigia", "PA", "1508209", "Viseu", "PA", "1508308"),
           c("Abaetetuba", "PA", "1500107", "Acara", "PA", "1500206"))

output <- list()
for(i in seq_along(li)){
  output[[i]] <- matrix(li[[i]], nrow=2, byrow = TRUE)
}

output[[1]]

 [,1] [,2] [,3] [1,] "Vigia" "PA" "1508209" [2,] "Viseu" "PA" "1508308"

output[[2]]

 [,1] [,2] [,3] [1,] "Abaetetuba" "PA" "1500107" [2,] "Acara" "PA" "1500206"

But we have to be aware that matrices can only have one data type, which means in this case that everything is going to be a string!