[R] Quick recode of -999 to NA in R

[peter dalgaard]

On Mar 30, 2011, at 16:05 , Christopher Desjardins wrote:

>> 
>> dat0 <- read.table('tim1.dat', na = -999)
>> 
> 
> Ah ... yes. I knew that but clearly didn't at the time of my question or
> script writing.
> Thanks,
> Chris

Depending on where your data came from, you could get caught by the fact that the above is really ...na.strings="-999"... and that is not going to work if the actual code is (say) -999.00.

Another straightforward option is dat0[dat0 == -999] <- NA


-- 
Peter Dalgaard
Center for Statistics, Copenhagen Business School
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Email: pd.mes at cbs.dk  Priv: PDalgd at gmail.com