[R] Adding row name to dataframe

[Michael Bedward]

Hello Tim,

Either of these variations on your example should work...

rownames(xy)[11] <- 12
rownames(xy)[11] <- "12"

It's just like assigning values to any character vector, so you can
also do things like...

rownames(xy) <- a.vector.of.all.the.row.names

rownames(xy)[1:10] <- paste("foo", 1:10, sep="")

Michael

On 27 September 2010 12:41, Tim Clark <mudiver1200 at yahoo.com> wrote:
> Dear all,
>
> I am trying to add a value to a dataframe and name the row with a number.  I
> have tried row.name, rowname, and attr(x,"row.names") but none seem to work.  It
> seems like it should be simple, so not sure why I can't get it to work.  Any
> suggestions?
>
> Thanks,
>
> Tim
>
>
>
> x<-seq(1,20,2)
> y<-seq(20,1,-2)
> xy<-data.frame(x,y)
> xy<-rbind(xy,c(0,0))
>
> #Threeattempts that fail
> row.names(xy[11,])<-c("12")
> rownames(xy[11,])<-c("12")
> attr(xy[11,], "row.names")<-c("12")
>
>
>  Tim Clark
>
> Marine Ecologist
> National Park of American Samoa
>
>
>
>
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