But when the slope is a factor, this gives me e.g. "factor1", "factor2",
"factor3", when what I would like to extract is "factor".

Dan


On Thu, Jul 25, 2013 at 4:42 PM, ONKELINX, Thierry <Thierry.ONKELINX@inbo.be
> wrote:

> You could do something like this
>
> sapply(VarCorr(model), colnames)
>
> or when you have only one grouping level
>
> colnames(VarCorr(model)[[1]])
>
> Best regards,
>
> ir. Thierry Onkelinx
> Instituut voor natuur- en bosonderzoek / Research Institute for Nature and
> Forest
> team Biometrie & Kwaliteitszorg / team Biometrics & Quality Assurance
> Kliniekstraat 25
> 1070 Anderlecht
> Belgium
> + 32 2 525 02 51
> + 32 54 43 61 85
> Thierry.Onkelinx@inbo.be
> www.inbo.be
>
> To call in the statistician after the experiment is done may be no more
> than asking him to perform a post-mortem examination: he may be able to say
> what the experiment died of.
> ~ Sir Ronald Aylmer Fisher
>
> The plural of anecdote is not data.
> ~ Roger Brinner
>
> The combination of some data and an aching desire for an answer does not
> ensure that a reasonable answer can be extracted from a given body of data.
> ~ John Tukey
>
>
> -----Oorspronkelijk bericht-----
> Van: r-sig-mixed-models-bounces@r-project.org [mailto:
> r-sig-mixed-models-bounces@r-project.org] Namens Daniel Ezra Johnson
> Verzonden: donderdag 25 juli 2013 15:54
> Aan: R Mixed Models
> Onderwerp: [R-sig-ME] extracting name of random slope from mer object
>
> Hello,
>
> I can extract the name(s) of random intercept variable(s) with this
> command:
>
> > names(VarCorr(model))
>
> Is there any easy way to extract the names of random slope variables?
> I can't find it anywhere in str(model).
>
> Thanks a lot,
> Dan
>
> P.S. I know I could compare the list of all variables, e.g.
>
> > names(model.frame(model))
>
> with the headings inside e.g. ranef(model), and match it up that way, but
> I was wondering if there was anything easier.
>
> Also, I can't use model@call because I'm calling lmer() out of another
> function!
>
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