"Gabor Grothendieck" <[EMAIL PROTECTED]> writes:
> > y ~ `offset(foo)` + offset(foo)
> >
> > I.e. perhaps the real issue is that names(data) gets generated without
> > backquotes.
> >
> > Anyways, this is a real can of worms and I'm not sure we're not too
> > close to 2.0.0 to start tampering with it...
>
> How about a partial fix that does not address pathological
> cases where the variable names themselves have embedded
> backquotes but does address the common cases such as:
>
> y <- ts(1:10); x1 <- y^2; x2 <- y^4
> lm(`lag(y)` ~ ., cbind(lag(y), x1, diff(x2)) )
>
> without having to resort to:
>
> lm(lag.y ~ ., cbind(lag.y = lag(y), x1, diff(x2)) )
Hmmm... Point taken, but I'm not happy about the fact that the
internals seem unable to discern `lag(y)` (the name) and lag(y) (the
call). One might consider "backtickifying" the names of the data
matrix instead:
> bq <- function(x)sapply(x,
function(nm)deparse(as.name(nm),backtick=TRUE))
> bq(c("a","a(b)"))
a a(b)
"a" "`a(b)`"
--
O__ ---- Peter Dalgaard Blegdamsvej 3
c/ /'_ --- Dept. of Biostatistics 2200 Cph. N
(*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907
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