Reference to dataframe and contents

-----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