Re: [R] Inf in regressions

From: Dimitris Rizopoulos <dimitris.rizopoulos_at_med.kuleuven.be>
Date: Wed 26 Oct 2005 - 01:04:20 EST

you could use:

lm( y ~ x + z + log(w), subset = w > 0)

I hope it helps.

Best,
Dimitris



Dimitris Rizopoulos
Ph.D. Student
Biostatistical Centre
School of Public Health
Catholic University of Leuven

Address: Kapucijnenvoer 35, Leuven, Belgium

Tel: +32/(0)16/336899
Fax: +32/(0)16/337015
Web: http://www.med.kuleuven.be/biostat/
     http://www.student.kuleuven.be/~m0390867/dimitris.htm


> Hi,
>
> Suppose I I wish to run
>
> lm( y ~ x + z + log(w) )
>
> where w assumes non-negative values. A problem arises when w=0, as
> log(0)
> = -Inf, and R doesn't accept that (as it "accepts" NA). Is there a
> way to
> tell R to do with -Inf the same it does with NA, i.e, to ignore it?
> (
> Otherwise I have to do something like
>
> w[w==0] <- NA
>
> which doesn't hurt, but might be a bit incovenient sometimes.)
>
> Thanks in advance.
>
> Dimitri
>
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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 Wed Oct 26 01:11:36 2005

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