[R] restrictions for attribute access <Watchdog: Virus checked>

[Benjamin Polak]

Thanks for your help, Henrique!

It's the same problem as I stated in my original post. The code works 
if it runs as a regular R script, but not if it runs within a custom 
package. Somehow, if the code is in the package, it doesn't "see" the 
attribute anymore. I don't understand why. I've played around with 
different imports in my NAMESPACE file, but it didn't help.


On Wednesday, 2. April 2008 14:41, Henrique Dallazuanna wrote:
> Work's for me:
>
> summary(lmer(Reaction ~ Days + (Days|Subject), sleepstudy))@AICtab
>
>
> On Wed, Apr 2, 2008 at 9:36 AM, Benjamin Polak
> <benjamin.polak at unisg.ch>
>
> wrote:
> > Thanks, but it doesn't work, I get the error message:
> >
> > 'no slot of name "AICtab" for this object of class "table"'
> >
> > On Wednesday, 2. April 2008 13:34, Henrique Dallazuanna wrote:
> > > You've tried:
> > >
> > > tab <- smry at AICtab
> > >
> > > ?
> > >
> > > On Wed, Apr 2, 2008 at 7:59 AM, Benjamin Polak
> >
> > <benjamin.polak at unisg.ch> wrote:
> > > > Hello everybody,
> > > >
> > > >  I have a problem with accessing class attributes. I think it
> > > > might be due to namespace access restrictions or something
> > > > similar, but I'm unable to figure it out, maybe someone knows
> > > > the trick how to do it ...
> > > >
> > > >  I'm trying to extract some information from the summary
> > > > object for a model fitted using the lmer function from the
> > > > lme4 package:
> > > >
> > > >   smry <- summary(lmer(foo ~ bar ...))
> > > >   tab <- attr(smry, "AICtab")
> > > >   tab$AIC
> > > >
> > > >  When I run this code as a regular R script everything works
> > > > fine, tab$AIC has the desired value. But when I try to run
> > > > this code from within a package I wrote, tab$AIC is NULL.
> > > >
> > > >  I've tried adding "import(lme4)", "importClassesFrom(lme4)"
> > > >  and "importMethodsFrom(lme4)" into the NAMESPACE file of my
> > > > package, but it didn't help, tab$AIC is still NULL.
> > > >
> > > >  Thanks for any kind of hint!
> > > >
> > > >  Best Regards,
> > > >  Ben
> >
> > ______________________________________________
> > 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.

-- 
Dipl.-Inf. Benjamin Polak
Forschungsstelle für Business Metrics
Universität St. Gallen
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CH-9010 St. Gallen
fon: +41 71 224 2138
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http://www.fbm.unisg.ch