Re: [Rd] Lemon drops

From: Achim Zeileis <Achim.Zeileis_at_wu-wien.ac.at>
Date: Tue 15 Mar 2005 - 19:05:40 GMT

On 15 Mar 2005 18:26:46 +0100 Peter Dalgaard wrote:

> Marc Schwartz <MSchwartz@MedAnalytics.com> writes:
>
> > On Tue, 2005-03-15 at 18:05 +0100, Peter Dalgaard wrote:
> > > I bumped into the following situation:
> > >
> > > Browse[1]> coef
> > > deg0NA deg4NA deg8NA deg0NP deg4NP deg8NP
> > > (Intercept) 462 510 528 492 660 762
> > > Browse[1]> coef[,1]
> > > [1] 462
> > > Browse[1]> coef[,1,drop=F]
> > > deg0NA
> > > (Intercept) 462
> > >
> > > where I really wanted neither, but
> > >
> > > (Intercept)
> > > 462
> > >
> > > Anyone happen to know a neat way out of the conundrum?
> > >
> > > I can think of
> > >
> > > rowSums(coef[,1,drop=F])
> > >
> > > or of course
> > >
> > > val <- coef[,1]
> > > names(val) <- rownames(x))
> > >
> > > but the first one is sneaky and the second gets a bit tedious...
> >
> > Peter,
> >
> > How about something like this:
> >
> > > x
> > deg0NA deg4NA deg8NA deg0NP deg4NP deg8NP
> > (Intercept) 462 510 528 492 660 762
> > IV1 1 2 3 4 5 6
> >
> >
> > > x[1]
> > (Intercept)
> > 462
> >
> > > str(x[1])
> > Named num 462
> > - attr(*, "names")= chr "(Intercept)"
> >
> >
> > Does that work or am I missing something?
>
> You're missing the context. What I really need is something that will
> extract a column of a matrix as a vector in the usual way, but will
> not get confused if there is only one row.

Maybe:
  coef[,1,drop=FALSE][1:nrow(coef)]
?
Z

>
> --
> O__ ---- Peter Dalgaard Blegdamsvej 3
> c/ /'_ --- Dept. of Biostatistics 2200 Cph. N
> (*) \(*) -- University of Copenhagen Denmark Ph: (+45)
> 35327918
> ~~~~~~~~~~ - (p.dalgaard@biostat.ku.dk) FAX: (+45)
> 35327907
>
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https://stat.ethz.ch/mailman/listinfo/r-devel Received on Wed Mar 16 06:12:55 2005

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