[R] Reference to dataframe and contents

[John Fox]

Dear Rene,

There are several ways to do what you want, including get(s1)[,S2].

I hope this helps,
 John

--------------------------------
John Fox
Department of Sociology
McMaster University
Hamilton, Ontario
Canada L8S 4M4
905-525-9140x23604
http://socserv.mcmaster.ca/jfox 
-------------------------------- 

> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch 
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Rene Braeckman
> Sent: Sunday, February 04, 2007 3:43 PM
> To: r-help at stat.math.ethz.ch
> Subject: [R] Reference to dataframe and contents
> 
> This is probably easy for experienced users but I could not 
> find a solution.
>  
> I have several R scripts that process several columns of a 
> dataframe (several dataframes and columns actually, but 
> simplified for my question).
> 
> References such as:
>  
> myDF$myCol
>  
> are all over. I like to automate this for other dataframes 
> and columns by defining a reference only once in the 
> beginning of the script.
> 
> One idea is to use strings:
> 
> s1 <- "myDF"
> S2 <- "myCol"
> 
> My question is how to construct the equivalent of myDF$myCol 
> that can be used as such. Or is there a better solution?
> 
> Thanks. The help and discussions on this forum are the best.
> Rene
> -----------------------------------------
> Rene Braeckman, PhD
> Clinical Pharmacology & Pharmacometrics
> Irvine, California, USA
> 
> ______________________________________________
> R-help at stat.math.ethz.ch 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.