library(tidyverse)
dat <- tibble(response = c("2;3", "1;3", "1;4", "1;2", "3;4;5", "1;4;5"))
dat
#> # A tibble: 6 × 1
#> response
#> <chr>
#> 1 2;3
#> 2 1;3
#> 3 1;4
#> 4 1;2
#> 5 3;4;5
#> 6 1;4;5
dat |>
mutate(
helper_response_min = map_chr(
response,
~ as.character(min(as.numeric(unlist(str_extract_all(.x, "\\d")))))
),
helper_response_max = map_chr(
response,
~ as.character(max(as.numeric(unlist(str_extract_all(.x, "\\d")))))
)
)
#> # A tibble: 6 × 3
#> response helper_response_min helper_response_max
#> <chr> <chr> <chr>
#> 1 2;3 2 3
#> 2 1;3 1 3
#> 3 1;4 1 4
#> 4 1;2 1 2
#> 5 3;4;5 3 5
#> 6 1;4;5 1 5
# alt workflow
str_extract_fun <- function(x, fun){
map_chr(
.x = x,
# a bit neat, but "fun" here gets treated as an argument
.f = \(x) as.character(fun(as.numeric(unlist(str_extract_all(x, "\\d")))))
)
}
str_extract_fun(dat$response, min)
#> [1] "2" "1" "1" "1" "3" "1"
str_extract_fun(dat$response, max)
#> [1] "3" "3" "4" "2" "5" "5"
dat |>
mutate(
helper_response_min = str_extract_fun(response, min),
helper_response_max = str_extract_fun(response, max)
)
#> # A tibble: 6 × 3
#> response helper_response_min helper_response_max
#> <chr> <chr> <chr>
#> 1 2;3 2 3
#> 2 1;3 1 3
#> 3 1;4 1 4
#> 4 1;2 1 2
#> 5 3;4;5 3 5
#> 6 1;4;5 1 5Created on 2025-07-17 with reprex v2.1.1
Session info
sessioninfo::session_info()
#> ─ Session info ───────────────────────────────────────────────────────────────
#> setting value
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#> os macOS Sonoma 14.5
#> system aarch64, darwin20
#> ui X11
#> language (EN)
#> collate en_US.UTF-8
#> ctype en_US.UTF-8
#> tz Australia/Brisbane
#> date 2025-07-17
#> pandoc 3.4 @ /Applications/RStudio.app/Contents/Resources/app/quarto/bin/tools/aarch64/ (via rmarkdown)
#> quarto 1.7.31 @ /usr/local/bin/quarto
#>
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