Re: [R] NA erase your data trick

From: Detlef Steuer <detlef.steuer_at_hsu-hh.de>
Date: Tue 17 May 2005 - 17:18:13 EST

On Tue, 17 May 2005 08:33:00 +0200
Uwe Ligges <ligges@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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R-help@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 Received on Tue May 17 17:41:15 2005

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