Re: [R] rename cols

From: Doran, Harold <HDoran_at_air.org>
Date: Tue 12 Sep 2006 - 12:17:14 GMT


I don't know, this seems pretty simple and intuitive (to me)

# Create a sample data set with 439 variables tmp <- data.frame(matrix(c(rnorm(4390)), ncol=439)) colnames(tmp)<-paste("col", 1:439, sep = "")

# rename a certain variable in that dataset names(tmp)[(which(names(tmp)=='col1'))]<-'NewName'

Here you are using indexing and a simple evaluation to find a variable by name in a large data set and rename it. R is so flexible that this cat can be skinned in many (and maybe even easier) ways, though.

Harold

> -----Original Message-----
> From: r-help-bounces@stat.math.ethz.ch
> [mailto:r-help-bounces@stat.math.ethz.ch] On Behalf Of Anupam Tyagi
> Sent: Tuesday, September 12, 2006 12:34 AM
> To: r-help@stat.math.ethz.ch
> Subject: Re: [R] rename cols
>
> For a newcomer who wants to rename variable "fksm" and "klmk"
> in a dataframe of with 439 variables there is not easy and
> intuitive solution. That person has to spend a lot of time
> listing columns and counting columns or doing string searches
> or using brackets within brackets within brackets to get a
> simple thing done. Is there a simple function or solution to

> this in R without using an add-on package?
>
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>



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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. Received on Tue Sep 12 22:25:52 2006

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