[R-sig-eco] The TWINSPAN program

[Gavin Simpson]

On Wed, 2011-04-13 at 12:13 +0200, Andres Mellado Diaz wrote:
> Hi,
> 
> It seems that there is no R function for TWINSPAN, but you can get the
> program for free here:
> 
> http://www.canodraw.com/wintwins.htm
> 
> Anyway, I would better use IndVal analysis (Dufrene & Legendre 1997)
> that you can find here for R (indicspecies
> package):http://sites.google.com/site/miqueldecaceres/software

Or in package labdsv under function indval().

And anyway, TWINSPAN and IndVal do very different things; the former
clusters data in groups and *then* also computes indicator species
values. The latter assumes that a clustering has already been performed
and computes indicator species values for that clustering.

G

> hope this helps,
> 
> Andres
> 
> Yong Zhang <2010202035 at njau.edu.cn> escribió:
> 
> > Helo all,
> >
> > These days, when I looked into the multivariate analysis of community 
> > data, I noticed that there is a very useful classification approach 
> > named "TWINSPAN", maybe most of you already know that its full name 
> > is "Two-way indicator species analysis", and the program has the same 
> > name---TWINSPAN.
> >
> > Could any one tell me whether this program is for free? And when and 
> > how could get one? Any hint or suggestion from you will be greatly 
> > appreciated.
> >
> > Thanks very much for your time and answer.
> >
> > All the best,
> > Yong
> >
> >
> > 2011-04-13
> >
> >
> >
> > ZHANG Yong
> > Lab of aquatic insects & stream ecology
> > Dept.of Entonology, Nanjing Agricultural University
> > Nanjing, 210095,China
> > Phone number:  (+86) -25-84395241
> > E-mail:2010202035 at njau.edu.cn
> >
> 
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