Try

DF [[mn [2]]]


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-------- Original message --------
From: Lorenzo Isella <lorenzo.isella@gmail.com> 
Date: 02/09/2013  8:40 AM  (GMT-05:00) 
To: r-help@stat.math.ethz.ch 
Subject: [R] Addressing Columns in a Data Frame 
 
Dear All,
Probably a one liner, but I am banging my head against the floor.
Consider the following

DF <- data.frame(
    x=1:10,
    y=10:1,
    z=rep(5,10),
    a=11:20
  )

mn<-names(DF)

but then I cannot retrieve a column by doing e.g,

DF$mn[2]

I tried to play with the quotes and so on, but so far with no avail.
Any suggestion is welcome.
Cheers

Lorenzo

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