Subset data.frame by column

Question

I have this data.frame:

a <- c(rep(\"1\", 3), rep(\"2\", 3), rep(\"3\",3), rep(\"4\",3), rep(\"5\",3))
b <- c(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15)
df <-         


        

Answer 1

You're confusing == with %in%:

subset(df, a %in% c(2,3))
#   a b
# 4 2 4
# 5 2 5
# 6 2 6
# 7 3 7
# 8 3 8
# 9 3 9