Change weekday name to a specific pattern

[JojoSouza]

I have a database that has a Week column. Weekday names are Sunday, Monday, Tuesday and only on. However, I would like to automatically change this to the following: Week = c("monday day","tuesday day","wednesday day","thursday day","friday day" "saturday","sunday day" ) .In this case below, as my database only has two days of the week, only Monday and Sunday will be changed. How to adjust this?

 Test <- structure(list(date1 = as.Date(c("2021-11-01","2021-11-01","2021-11-01","2021-11-01")),
                       date2 = as.Date(c("2021-10-18","2021-10-18","2021-10-28","2021-10-30")),
                       Week = c("Monday", "monday", "Sunday", "Sunday"),
                       Category = c("FDE", "FDE", "FDE", "FDE"),
                       time = c(4, 6, 6, 3)), class = "data.frame",row.names = c(NA, -4L))

[StatSteph]

Here's two ways to do this - one in Base R and one in tidyverse.

# Base R
Test_Orig <- Test <- structure(list(date1 = as.Date(c("2021-11-01","2021-11-01","2021-11-01","2021-11-01")),
                       date2 = as.Date(c("2021-10-18","2021-10-18","2021-10-28","2021-10-30")),
                       Week = c("Monday", "monday", "Sunday", "Sunday"),
                       Category = c("FDE", "FDE", "FDE", "FDE"),
                       time = c(4, 6, 6, 3)), class = "data.frame",row.names = c(NA, -4L))
Test$Week <- paste(Test$Week, "day")
Test
#>        date1      date2       Week Category time
#> 1 2021-11-01 2021-10-18 Monday day      FDE    4
#> 2 2021-11-01 2021-10-18 monday day      FDE    6
#> 3 2021-11-01 2021-10-28 Sunday day      FDE    6
#> 4 2021-11-01 2021-10-30 Sunday day      FDE    3

# tidyverse
library(tidyverse)
Test <- Test_Orig

Test <- Test %>%
   mutate(
      Week=str_c(Week, "day", sep=" ")
   )
Test
#>        date1      date2       Week Category time
#> 1 2021-11-01 2021-10-18 Monday day      FDE    4
#> 2 2021-11-01 2021-10-18 monday day      FDE    6
#> 3 2021-11-01 2021-10-28 Sunday day      FDE    6
#> 4 2021-11-01 2021-10-30 Sunday day      FDE    3

^{Created on 2021-12-27 by the reprex package (v2.0.1)}