Hi,
rename_columns<- function(dat){
for(i in 2:(ncol(dat))){
names(dat)[i]<- paste(names(dat)[1],names(dat)[i],sep="_")
}
dat
}
dat1<- read.table(text="
chr pos ref alt
chr1 5 A G
chr1 8 T C
chr2 2 C T
",sep="",header=TRUE,stringsAsFactors=FALSE)
rename_columns(dat1)
# chr chr_pos chr_ref chr_alt
#1 chr1 5 A G
#2 chr1 8 T C
#3 chr2 2 C T
A.K.
----- Original Message -----
From: Arman Eshaghi <arman.esha...@gmail.com>
To: r-help@r-project.org
Cc:
Sent: Friday, June 14, 2013 9:34 AM
Subject: [R] rename and concatenate name of columns
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!
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and provide commented, minimal, self-contained, reproducible code.
