[R] rename cols

[Doran, Harold]

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 at stat.math.ethz.ch 
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Anupam Tyagi
> Sent: Tuesday, September 12, 2006 12:34 AM
> To: r-help at 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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