Hi Conrado and Jari,

Indeed, using vegan 1.17.2 and R version 2.10.1 (32-bits), I got no warnings
and the output Conrado sent above.

All the best,

Marcus

On Thu, Aug 19, 2010 at 8:36 AM, Conrado Galdino <galdinoc@gmail.com> wrote:

> 2010/8/19 Jari Oksanen <jari.oksanen@oulu.fi>
>
> > On 19/08/10 01:07 AM, "Conrado Galdino" <galdinoc@gmail.com> wrote:
> >
> > > Thanks very much for your response Jari,
> > >
> > > Is good to know from you that there is nothing to worry. I'll surely
> > check
> > > the plots. Taking the opportunity I also like to inform that in newer
> > > versions of the package (I was using 1.17-1) there are no warnings.
> After
> > an
> > > advice from Mr. Marcus Cianciaruso I updated vegan and no warnings were
> > > shown.
> >
> > No warnings? That's a surprise! I ran bleeding edge version of vegan (to
> be
> > released on Friday) and I got warnings. Perhaps there were so many
> warnings
> > that they were not printed individually? Honestly, warnings are
> commonplace
> > in radfit() since many of the models often work on the limit of their
> > domain
> > and try to find coefficients that are close to zero or Infinity. Your
> case
> > was an example: the model tried to use a three-parameter exponential
> > equation draw a line.
> >
> > Cheers, Jari Oksanen
> >
> >
>
> Jari,
>
> Follow bellow the output of radfit(), showing no warnings, using a newer
> version of vegan:
>
> > fevc
>  [1]   2 155   1  57   1  24   6   7   6   2 155 140   2
> > library(vegan)
> This is vegan 1.17-3
> > rad=radfit(fevc)
> > warnings()
> NULL
> > rad
>
> RAD models, family poisson
> No. of species 13, total abundance 558
>
>           par1     par2       par3       Deviance AIC     BIC
> Null                                      256.460  310.875 310.875
> Preemption  0.3811                         75.016  131.432 131.997
> Lognormal   2.8675   1.4702               180.305  238.721 239.851
> Zipf        0.43766 -1.3642               252.046  310.462 311.592
> Mandelbrot    Inf   -2.779e+08  5.792e+08  75.014  135.430 137.125
>
>
> Thanks again,
>
> --
> Conrado A. B. Galdino
> --
>
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>
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-- 
-----------------------------------------------------------------------
Prof. Dr. Marcus Cianciaruso
Department of Ecology
Universidade Federal de Goiás
http://sites.google.com/site/cianciaruso/

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