On 2015-03-27 09:19, Patrick Connolly wrote:
[...]
On Sun, 22-Mar-2015 at 08:06AM -0800, John Kane wrote:
|> Well, first off, you have no variable called "Name". You have lost
|> the state names as they are rownames in the matrix state.x77 and
|> not a variable.
If you did this:
all.states <- within(as.data.frame(state.x77), Name <- rownames(state.x77))
instead of
all.states <- within(as.data.frame(state.x77), state <- rownames(state.x77))
Alternatively, since 'data.frame()' coerces internally, one could do
all.states <- data.frame(state.x77, Name = rownames(state.x77))
Henric Winell
then this would worka;
cold.states <- all.states[all.states$Frost > 150, c("Name", "Frost")]
Modify the above to match where my guess at what you tried is in error.
HTH
______________________________________________
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.
