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

This one is similar to @Onyambu, only using plyr's mapvalues() and lubridate's hour():

library(lubridate)
library(plyr)
df$timeofdat<-   mapvalues(hour(df$time),from=c(0:23),
  to=c(rep("night",times=5), rep("morning",times=6),rep("afternoon",times=5),rep("night", times=8)))