[R] reorder data.frame

[R. Michael Weylandt]

df = data.frame(x1 = 100:105, x2 = 200:205)
library(reshape2)
melt(df)

Michael

On Wed, Nov 9, 2011 at 10:14 AM, Johannes Radinger <JRadinger at gmx.at> wrote:
> Hello,
>
> I very general question but probably usefull to others as well:
>
> Is there any prebuild function that reorders a dataframe from:
>
>   x1    x2
> 1  100   200
> 2  101   201
> 3 102 202
> 4  103   203
> 5  104   204
> 6  105   205
>
> to
>
> 1  100  x1
> 2  101  x1
> 3  102  x1
> 4  103  x1
> 5  104  x1
> 6  105  x1
> 7  200  x2
> 8  201  x2
> 9  202  x2
> 10  203  x2
> 11  204  x2
> 12  205  x2
>
> I found a way with:
>
> names <- rep(c("x1","x2"),c(length(x1),length(x2)))
> x <-c(x1,x2)
> data.frame(x,names)
>
> but probably there is already another function for doing such things more easily.
>
> Thank you
> Johannes
> --
>
> ______________________________________________
> 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.
>