使用 R，如何根据范围内的数字为新列分配值？

Question

i have a column called reported age that can range from 0 to 100.

Report age|
         5
        82
        17
        39
        67

I would like to create a script that assigns a new column called Age Group

Report age|Age Group|
         5    5 to 9
        82  80 to 84
        17  15 to 19
        39  35 to 39 
        67  64 to 69

I know if i have

df <-df %>%
    mutate(Age_Group = ifelse(`Report age` <5, "Under 5", No)

I will get two outcomes. I want to set up way more. Under 5, 5 to 9, 10 to 14, 15 to 19, and so on until "85 years and over".

Answer 1

We can use cut to create the group

library(dplyr)
brks <- c(5, 9, 15, 35, 39, 64, 69, 80, 84)

df %>%
   mutate(Age_Group = cut(`Report age`, 
      breaks = c(-Inf, brks, Inf),
      labels = c("under 5", paste(head(brks, -1),
                " to ", tail(brks, -1)), "85 years and over")))