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renaming column names

David Winsemius

Sun, May 31, 2009 9:11 AM

Cannot reproduce with a toy example:

 > data <- data.frame(a=1:3, b=4:6, c=6:8)
 > colnames(data) <- c("d","e","f")
 > colnames(data)
[1] "d" "e" "f"


Perhaps you need to produce more detail. Surely offering the results  
of dput(a) would not tax the limits of the R-mail server.

David

On May 31, 2009, at 11:58 AM, Benny Chain wrote:

> I am trying to rename the column names of a data frame called  
> "data". It has
> 177 columns. I have used :
>
> colnames(data) <- a
>
>
>
> where a is a vector with 177 character names.
>
>
>
> I don't get any error message, but the column names don't change  
> because
> when I then type :
>
> colnames(data)
>
>
>
> I get the same set of names as before, so the assignment doesnt seem  
> to have
> worked.
>
>
>
> Any ideas or suggestions gratefully received.
>
>
>
> Benny Chain
>
> Benjamin Chain
>
> Division of Infection and Immunity
>
> Windeyer Building
>
> UCL, 46 Cleveland St.
>
> London W1T 4JF
>
> Fax 00 44 20 7679 9301
>
>
>
>
> 	[[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.

David Winsemius, MD
Heritage Laboratories
West Hartford, CT

Thread (3 messages)

Benny Chain renaming column names May 31 David Winsemius renaming column names May 31 Benny Chain renaming column names May 31