This works, where zz is a dataframe:
for(i in 1:nrow(zz)) {
zzz[i,1]<-paste(zz[i,1],zz[i,2],sep="_")
}
I would like to use "apply" to concatentate two columns of text along
with
a separator.
How?
Chet
[[alternative HTML version deleted]]
What is wrong with utilizing the vectorized nature of paste?
zz[[1]] <- paste(zz[[1]],zz[[2]],sep="_")
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Chet Seligman <chet.seligman at gmail.com> wrote:
>This works, where zz is a dataframe:
>
>for(i in 1:nrow(zz)) {
> zzz[i,1]<-paste(zz[i,1],zz[i,2],sep="_")
> }
>
>I would like to use "apply" to concatentate two columns of text
along
>with
>a separator.
>How?
>
>Chet
>
> [[alternative HTML version deleted]]
>
>______________________________________________
>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.
You don't need loops or apply with paste since it's vectorized: x <- data.frame(n = 1:5, l = letters[1:5], stringsAsFactors = FALSE) paste(x[,1], x[,2], sep = "_") Cheers, Michael On Tue, Aug 21, 2012 at 10:57 AM, Chet Seligman <chet.seligman at gmail.com> wrote:> This works, where zz is a dataframe: > > for(i in 1:nrow(zz)) { > zzz[i,1]<-paste(zz[i,1],zz[i,2],sep="_") > } > > I would like to use "apply" to concatentate two columns of text along with > a separator. > How? > > Chet > > [[alternative HTML version deleted]] > > ______________________________________________ > 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.