[R] Inf in regressions

From: Dimitri Szerman <dimitrijoe_at_ipea.gov.br>
Date: Wed 26 Oct 2005 - 00:47:47 EST


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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