Creating season variable by month with dplyr in R

Question

I have a dataset that has a variable called month, which each month as a character. Is there a way with dplyr to combine some months to create a season variable? I have trie

Answer 1

When there are multiple key/value, we can do a join with a key/val dataset

keyval <- data.frame(month = month.abb, 
      season = rep(c("Winter", "Spring", "Summer", "Fall"), each = 3),
      stringsAsFactors = FALSE)

left_join(data, keyval)