Hi, I'm just learning my way around R. I got a bunch of states and would like to access to get all of the ones where it's cold. But when I do the following, I will get the following error:
> all.states <- as.data.frame(state.x77) > cold.states <- all.states[all.states$Frost > 150, c("Name", "Frost")] Error in `[.data.frame`(all.states, all.states$Frost > 150, c("Name", : undefined columns selected I don't get it. When I look at all.states, this is what I see: > str(all.states) 'data.frame': 50 obs. of 8 variables: $ Population: num 3615 365 2212 2110 21198 ... $ Income : num 3624 6315 4530 3378 5114 ... $ Illiteracy: num 2.1 1.5 1.8 1.9 1.1 0.7 1.1 0.9 1.3 2 ... $ Life Exp : num 69 69.3 70.5 70.7 71.7 ... $ Murder : num 15.1 11.3 7.8 10.1 10.3 6.8 3.1 6.2 10.7 13.9 ... $ HS Grad : num 41.3 66.7 58.1 39.9 62.6 63.9 56 54.6 52.6 40.6 ... $ Frost : num 20 152 15 65 20 166 139 103 11 60 ... $ Area : num 50708 566432 113417 51945 156361 ... What am I messing up? [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.