Message-ID: <20050517091813.0520b712.detlef.steuer@hsu-hamburg.de>
Date: 2005-05-17T07:18:13Z
From: Detlef Steuer
Subject: NA erase your data trick
In-Reply-To: <4289901C.60608@statistik.uni-dortmund.de>
On Tue, 17 May 2005 08:33:00 +0200
Uwe Ligges <ligges at statistik.uni-dortmund.de> wrote:
> Anders Schwartz Corr wrote:
> > Oops,
> >
> > I just erased all my data using this gizmo that I thought would replace -9
> > with NA.
> >
> > A) Can I get my tcn5 back?
>
> As you got it the first time. There is nothing like "undo".
If you??re lucky it still lives inside an old, not overwritten when leaving the depressing R session .RData.
Detlef
>
>
> > B) How do I do it right next time, I learned my lesson, I'll never do it
> > again, I promise!
>
> By vectorization:
>
> tcn5[tcn5 == -9] <- NA
>
> Uwe Ligges
>
>
>
> > Anders Corr
> >
> >
> >>for(i in 1:dim(tcn5)[2]){ ##for the number of columns
> >
> > + for(n in 1:dim(tcn5)[1]){ ##for the number of rows
> > + tcn5[is.na(tcn5[n,i]) | tcn5[n,i] == -9] <- NA
> > +
> > + }
> > + }
> >
> >
> > ______________________________________________
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>
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