colname refered by a variable
or even shorter
df[,paste("A","C",sep="")]
"Santosh Srinivas" <santosh.srinivas at gmail.com> wrote in message
news:AANLkTikcJy7BVyfBwUwmRQ4dHg4pBdau+Qh_7+K+bRt2 at mail.gmail.com...
try this ..
df[,colnames(df)==paste("A","C",sep="")]
On Fri, Dec 3, 2010 at 12:05 PM, Yuan Jian <jayuan2008 at yahoo.com> wrote:
Hello, I tried to use a variable to refer colname, but I got error, could anyone give me advice?
df=data.frame(cbind(AB=1:3,AC=3:5)) df$AC
[1] 3 4 5
df$paste("A","C",sep="")
Error: attempt to apply non-function thanks Jian [[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.