[R-sig-eco] how to detect different species among samples

[Olmo]

Hi, maybe you must think about the biological meaning of your question,
and you could try some ordination analysis, perhaps you are interested
in some kind or beta diversity?

 Hope it helps,
Olmo.

El Sat, 1 Feb 2014 14:08:06 +0100
Gian Maria Niccolò Benucci <gian.benucci at gmail.com> escribió:
> Hi Sarah,
> 
> I am sorry, I'll try to be more precise. Given a dataset like...
> 
> > data(dune)
> > dune[1:8, 1:10]
>    Belper Empnig Junbuf Junart Airpra Elepal Rumace Viclat Brarut
> Ranfla 2       3      0      0      0      0      0      0
> 0      0      0 13      0      0      3      0      0      0
> 0      0      0      2 4       2      0      0      0      0
> 0      0      0      2      0 16      0      0      0      3
> 0      8      0      0      4      2 6       0      0      0
> 0      0      0      6      0      6      0 1       0      0
> 0      0      0      0      0      0      0      0 8       0
> 0      0      4      0      4      0      0      2      2 5
> 2      0      0      0      0      0      5      0      2      0
> 
> In this dataset we can see that the first species, named Belper, is
> present in samples 2, 4 and 5 but is absent in samples 13, 16 and so
> on... Now my question is, how can I extract the names of the species
> (and even their abundances) that are common and the species that are
> not common between the different samples in my dataset?
> 
> Many thanks in advance,
> 
> --
> Gain
> 
> 
> 
> 
> 
> 
> On 1 February 2014 13:42, Sarah Goslee <sarah.goslee at gmail.com> wrote:
> 
> > Hi Gian,
> >
> > I don't understand what you're trying to do. Can you give a simple
> > example of your data and what your results should be?
> >
> > Sarah
> >
> > On Saturday, February 1, 2014, Gian Maria Niccolò Benucci <
> > gian.benucci at gmail.com> wrote:
> >
> >> Hi all R-sig-ecologists,
> >>
> >>
> >> Sorry for the very simple and probably stupid question. I was
> >> wandering if exist a simple method or a function in R, to detect
> >> which different species
> >> are present among the samples of a given data community matrix.
> >> Thanks a lot in advance,
> >>
> >> --
> >> Gian
> >>
> >
> >
> > --
> > Sarah Goslee
> > http://www.stringpage.com
> > http://www.sarahgoslee.com
> > http://www.functionaldiversity.org
> >
> 
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