Convert time object to categorical (morning, afternoon, evening, night) variable in R?

Question

I have this vector in a data frame of times in the format of hours:minutes that I want converted to categorical times of day:

    time <- c(\"15:03\", \"0         


        

Answer 1

Using some regex and ifelse

df$hour <- as.numeric(gsub("\\:.*$", "", df$time))
df$cat <- with(df,  ifelse(hour >= 5 & hour<=11, "morning",
                            ifelse(hour>11 & hour<=16, "evening", "night")))
df
   time hour     cat
1 15:03   15 evening
2 08:01    8 morning
3 11:59   11 morning
4 23:47   23   night
5 14:20   14 evening