Names not conforming to the usual R syntax can be placed
in backquotes:
> `log(x)` <- 1:10
> lm(`log(x)` ~ 1)
Call:
lm(formula = `log(x)` ~ 1)
Coefficients:
(Intercept)
5.5
On Nov 28, 2007 9:52 AM, vito muggeo <[EMAIL PROTECTED]> wrote:
> Dear all,
> I have the following (rather) strange problem..
> For some reasons, I finally work with a variable whose name includes an
> R function, "a.log(z)", say. And that is a problem when I call it in a
> formula, for instance:
>
> > myname<-"a.log(z)"
> > dd<-data.frame("a.log(z)"=1:10,y=rnorm(10))
> > o<-lm(y~1,data=dd)
> > fo<-as.formula(paste(".~.+",paste(myname, collapse = "+")))
> > fo
> . ~ . + a.log(z)
> > update(o,formula=fo)
> Error in eval(expr, envir, enclos) : could not find function "a.log"
> >
>
> How can fit the model? namely how can I use "a.log(z)" in the example above?
>
> Many thanks,
> vito
>
>
> --
> ====================================
> Vito M.R. Muggeo
> Dip.to Sc Statist e Matem `Vianelli'
> Università di Palermo
> viale delle Scienze, edificio 13
> 90128 Palermo - ITALY
> tel: 091 6626240
> fax: 091 485726/485612
>
> ______________________________________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
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