[R] newbie questions: attached data.frames and rm()

From: Alojz Loui Polic (lpolic@ineural.com)
Date: Sat 24 Mar 2001 - 04:20:22 EST

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Message-ID: <A1D7DE9027B3D3119FA00090278A28EC04FB3E@xenon.ineural.com>

Hi

I'm just starting with R-plus and I have noticed
the following behaviour.

If a data.frame is attached and then removed before
being detached, the data is still present in the
path and can accessed. Is this expected behaviour,
and if so why?

Thank you

Loui

below is sample code to show this, I'm using R-1.2.2
on Win-NT4

AA <- c(1, 1, 1, 1, 1)
BB <- c(2, 3, 2, 1, 2)
data1 <- data.frame( AA.data=AA, BB.data=BB )
ls()
attach(data1)
ls(2)

rm(data1)
ls()
ls(2)
AA.data[1]
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• Next message: Ko-Kang@xtra.co.nz: "Re: [R] R-demo for non-statisticians/mathematicians"
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