Thanks all!
On Fri, Jun 14, 2013 at 6:40 PM, Rainer Schuermann <
rainer.schuerm...@gmx.net> wrote:
> df1 <- data.frame( A = runif( 10 ), B = runif( 10 ) * 5, C = runif( 10 ) *
> 10, D = runif( 10 ) * 20 )
> df2 <- data.frame( X = runif( 10 ), Y = runif( 10 ) * 5, Z = runif( 10 ) *
> 10 )
> rename_columns <- function( dataset )
> {
> for( i in 2:ncol( dataset ) )
> colnames( dataset )[i] <- paste( colnames( dataset )[1],
> colnames( dataset )[i], sep = "_" )
> return( dataset )
> }
>
> df1 <- rename_columns( df1 )
> df1
> A A_B A_C A_D
> 1 0.79914742 4.4898911 2.8869670979 11.067921
> 2 0.34552180 3.5456202 7.4774973304 8.610913
> 3 0.02950957 3.1754457 2.4493258283 17.649965
> 4 0.41804920 3.6180818 2.4680344155 5.038590
> 5 0.69496877 1.7169792 0.8790624910 3.476689
> 6 0.79293910 0.4452258 9.5359219401 3.668066
> 7 0.06135734 0.9188141 8.4256720915 9.980292
> 8 0.86066946 1.2674735 4.1982888198 13.561160
> 9 0.41895427 0.1434889 0.0007853331 3.187101
> 10 0.09498189 4.5215823 1.0008131783 10.428556
>
>
>
>
>
> On Friday 14 June 2013 18:04:22 Arman Eshaghi wrote:
> > Dear all,
> >
> > I have different data frames for which I would like to modify names of
> each
> > column such that the new name would include the name of the first column
> > added to the name of other columns; I came up with the following code.
> > Nothing changes when I run the following code. I would be grateful if
> > someone could help me.
> >
> > All the best,
> > -Arman
> >
> > rename_columns <- function(dataset) {
> > for (i in 2:(ncol(dataset))) {names(dataset)[i] <-
> paste(names(dataset)[1],
> > names(dataset)[i], sep="_")
> > }
> > }
> >
> > rename_columns(dataset) %nothing happens!
> >
> > [[alternative HTML version deleted]]
> >
> > ______________________________________________
> > R-help@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.
>
> ______________________________________________
> R-help@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.
>
[[alternative HTML version deleted]]
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