Re: [R] NA erase your data trick

From: Uwe Ligges <ligges_at_statistik.uni-dortmund.de>
Date: Tue 17 May 2005 - 16:33:00 EST

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".

> 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 17:15:56 2005

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