Apologies for the naieveness of this question, but I'm having trouble
figuring out to have factor() maintain original ordering.
For example,
foo <- c("b","b","a","a")
levels(factor(foo, ordered=T)) #I'd like this to return as "b"
"a"
#not "a" "b"
I thought having ordered=T would do the trick.
Thanks,
Andrew
> foo <- sample(letters, 10, replace = TRUE) > foo[1] "i" "j" "u" "f" "a" "k" "m" "k" "i" "w"> unique(foo)[1] "i" "j" "u" "f" "a" "k" "m" "w"> bar <- factor(foo, levels = unique(foo)) > bar[1] i j u f a k m k i w Levels: i j u f a k m w>Is this what you are trying to do? HTH Steve McKinney -----Original Message----- From: r-help-bounces at r-project.org on behalf of Andrew Yee Sent: Tue 6/17/2008 9:22 PM To: r-help at r-project.org Subject: [R] keeping original order in factor() Apologies for the naieveness of this question, but I'm having trouble figuring out to have factor() maintain original ordering. For example, foo <- c("b","b","a","a") levels(factor(foo, ordered=T)) #I'd like this to return as "b" "a" #not "a" "b" I thought having ordered=T would do the trick. Thanks, Andrew ______________________________________________ R-help at r-project.org mailing list 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.
Andrew
levels(factor(foo, levels=c('b','a')))
should work. You can make foo an ordered factor too, but that is not
necessary.
HTH .......
Peter Alspach
> -----Original Message-----
> From: r-help-bounces at r-project.org
> [mailto:r-help-bounces at r-project.org] On Behalf Of Andrew Yee
> Sent: Wednesday, 18 June 2008 4:22 p.m.
> To: r-help at r-project.org
> Subject: [R] keeping original order in factor()
>
> Apologies for the naieveness of this question, but I'm having
> trouble figuring out to have factor() maintain original ordering.
>
> For example,
>
> foo <- c("b","b","a","a")
> levels(factor(foo, ordered=T)) #I'd like this to return as
"b" "a"
> #not "a" "b"
>
> I thought having ordered=T would do the trick.
>
> Thanks,
> Andrew
>
> ______________________________________________
> R-help at r-project.org mailing list
> 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.
>
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