[R] Factors attribute?

[rkevinburton at charter.net]

I am sorry but I didn't see "factors" mentioned in this documentation.

Kevin

---- Henrique Dallazuanna <wwwhsd at gmail.com> wrote: 
> See ?terms
> 
> On Mon, Mar 22, 2010 at 2:08 PM,  <rkevinburton at charter.net> wrote:
> > I noticed that when I fit a linear model using 'lm' there is an attribute called "factors" that is added to the "term". It doesn't seem to appear for 'model.matrix', just 'lm'. I have been unable to find where it gets constructed or what it means? It looks like a two dimensional array that I may be able to use so I would just like to get some 'official' statement regarding what it is and how it is constructed. I would rather not go on my assumptions. An example would be like:
> >
> >> l <- lm(prestige ~ income + education, data=Duncan)
> >> attr(l$terms,"factors")
> >          income education
> > prestige       0         0
> > income         1         0
> > education      0         1
> >
> > Thank you.
> >
> > Kevin Burton
> > rkevinburton at charter.net
> >
> > ______________________________________________
> > R-help at 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.
> >
> 
> 
> 
> -- 
> Henrique Dallazuanna
> Curitiba-Paraná-Brasil
> 25° 25' 40" S 49° 16' 22" O