Add column which contains binned values of a numeric column

by

See ?cut and specify breaks (and maybe labels).

x$bins <- cut(x$rank, breaks=c(0,4,10,15), labels=c("1-4","5-10","10-15"))
x
#   rank  name   info  bins
# 1    1 steve    red   1-4
# 2    3   joe   blue   1-4
# 3    6  john  green  5-10
# 4    3   liz yellow   1-4
# 5   15   jon   pink 10-15

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