在 R 中按 data.frame 的变量排列数据？

Question

I have written down the following script to get the data in longer format . How i can get the data.frame arrange by variables and not by Date ?. That means first i should get the data for Variable A for all the dates followed by Variable X .

library(lubridate)
library(tidyverse)

set.seed(123)

DF <- data.frame(Date = seq(as.Date("1979-01-01"), to = as.Date("1979-12-31"), by = "day"),
                 A = runif(365,1,10), X = runif(365,5,15)) %>% 
      pivot_longer(-Date, names_to = "Variables", values_to = "Values")

Answer 1

Maybe I not understood wrigth, but you can arrange your data according to the variables column, through the arrange() function.

library(tidyverse)

DF <- DF %>% 
  arrange(Variables)

Resulting this

# A tibble: 730 x 3
   Date       Variables Values
   <date>     <chr>      <dbl>
 1 1979-01-01 A           3.59
 2 1979-01-02 A           8.09
 3 1979-01-03 A           4.68
 4 1979-01-04 A           8.95
 5 1979-01-05 A           9.46
 6 1979-01-06 A           1.41
 7 1979-01-07 A           5.75
 8 1979-01-08 A           9.03
 9 1979-01-09 A           5.96
10 1979-01-10 A           5.11
# ... with 720 more rows

Answer 2

在base R ，我们可以使用

DF1 <- DF[order(DF$Variables),]

Answer 3

Am I missing something? This is it.

arrange (DF,Variables,Date) %>% select(Variables,everything())