![](/img/trans.png)
[英]How to create list of functions with multiple parameters from dataframes in R?
[英]How can I create multiple matrices or dataframes from a list in R?
我有一個這樣的列表:
[[1]]
[1] "Vigia" "PA" "1508209"
[4] "Viseu" "PA" "1508308"
[[2]]
[1] "Abaetetuba" "PA" "1500107"
[4] "Acara" "PA" "1500206"
我想制作兩個這樣的矩陣:
[,1] [,2] [,3]
[1,] Vigia PA 1508209
[2,] Viseu PA 1508308
[,1] [,2] [,3]
[1,] Abaetetuba PA 1500107
[2,] Acara PA 1508308
我試過用
for(i in 1:2){
output[i] <- matrix(unlist(A[[i]]), ncol = 3, byrow = TRUE)
}
但它不起作用。 我還嘗試將該列表轉換為數據框,但我不能。
更正了我的答案,因此它使用循環:
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"
但是我們必須意識到矩陣只能有一種數據類型,這意味着在這種情況下,一切都將是字符串!
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.