from the vegan FAQ (link see below):

"3.1 Is there TWINSPAN?

No. It may be possible to port TWINSPAN to vegan, but it is not among the vegan top priorities. If anybody wants to try porting, I will be happy to help. TWINSPAN has a very permissive license, and it would be completely legal to port the function into R. "

AFAIK cluster::diana isn't the same as TWINSPAN; but both are a divisive hierarchical clustering method.

http://vegan.r-forge.r-project.org/FAQ-vegan.html#Is-there-TWINSPAN_003f

Vielen Dank, Helmut.

Dear Danka,

no, TWINSPAN is still not in R. Sounds like (according to Jari Oksanen) the import of the original Fortran library is not that easy as in case of Decorana (DCA). Some time ago Dave Roberts tried to recode the whole algorithm into R, but the performance somewhat differ from the original program, and I haven't seen it anywhere since.

Perhaps the simplest way to do Twinspan is to use freeware program from here: http://www.canodraw.com/wintwins.htm

and import data back to R.

I personally hope once there will be Twinspan in R, since it's still rather popular among vegetation ecologists...

Greetings

David

Thank you David,

I already use the free Twinspan from http://www.canodraw.com/wintwins.htm  , I was just wondering about R.

David, prave sa pozeram, ze sa nasa vyuka ciastocne prekryva. Ucim Bi5980 a Bi8600; mame k obom predmetom hotove ucebnice, su k dispozicii na http://www.iba.muni.cz/index.php?pg=vyuka--ucebnice .

Danka, děkuji za odkaz, skripta jsou pěkná, znal jsem jen Statistické hodnocení biodiverzity od Jarkovského, ale vidím že se od té doby leccos změnilo. Překrýváme se náplní, ale asi ne osazenstvem, i když moje doktorandka k Vám na vícerozměrné metody chodila :) Zdravím David

Vylepsene kapitoly (zatial este nie kompletne) z Vicerozmerek su aj na nasom portaly matematickej biologie; prave tam som robila priklad na Twinspan tym volne dostupnym softwarom

  http://portal.matematickabiologie.cz/index.php?pg=analyza-a-hodnoceni-biologickych-dat--vicerozmerne-statisticke-metody

Hello Danka

You can try with CAP (Community Analysis Package) for TWINSPAN  

Hi, but as I understand, CAP (Community Analysis Package version 5.0, http://www.pisces-conservation.com/index.html?softcap.html$softwaremenu.html) is software package, not R library. Or is this CAP available also as an R packages?

There are several standalone software programs running Twinspan - e.g. WinTWINS, JUICE, CAP, PC-ORD, but as I know, it's not available in R. I tried to port it into R (see package twinspanR, https://davidzeleny.wordpress.com/2015/05/10/twinspan-in-r/), but it's just beta version of R package, and works only under Windows. As far as I know, there is no other implementation of TWINSPAN in R so far - but I will be happy to know if I am wrong...

David

Hi,

You can install a modified version of TWINSPAN. Instructions in this page:

http://www.davidzeleny.net/anadat-r/doku.php/en:hier-divisive

Also you can try other version of clustering methods in community ecology inside R such as the library FLEXCLUST or the Indicator Analysis (indval) of the library LABDSV.

Good luck

Great. How do you plan to implement TWINSPAN algorithm in R? David