You are right, Attila, I missed the canonical part. It is either detrended & unconstrained (decorana) or plain & constrained/canonical (cca).
Cheers, Peter On Wed, Nov 11, 2020 at 3:27 PM Attila Lengyel <lengyel...@gmail.com> wrote: > Dear Peter, > > as far as I know, vegan::decorana does not do DCCA (detrended canonical > correspondence analysis) but the unconstrained DCA. If anyone knows the > answer for Jonathan's question, please, share it with me, I would also be > interested. > Best regards, > > Attila > > Peter Solymos <soly...@ualberta.ca> ezt írta (időpont: 2020. nov. 5., Cs, > 19:19): > >> Jonathan, >> >> Have you checked ?vegan::decorana (it is also mentioned in the vignette on >> p 2: >> https://cran.r-project.org/web/packages/vegan/vignettes/intro-vegan.pdf >> ) >> >> Cheers, >> >> Peter >> >> On Thu, Nov 5, 2020 at 11:03 AM Jonathan Gordon < >> jonathangordon...@gmail.com> >> wrote: >> >> > Hello, >> > >> > I’m aiming to perform a detrended canonical correspondence analysis on a >> > pollen sequence, to create beta diversity curves for pollen sequences >> > through time. An example of this being done is in Felde (2019) < >> > https://link.springer.com/article/10.1007/s00334-019-00726-5>. As far >> as >> > I can tell, DCCA can’t be done in R packages such as vegan, and can >> only be >> > completed in Canoco. I’m keen not to use Canoco because it's not open >> > access and the processes behind the interface are obscured, making for a >> > non-repeatable methodology. Please could you advise any way for me to >> > perform a DCCA to obtain my desired results, or of a different method? >> > >> > Best wishes, >> > Jonny >> > [[alternative HTML version deleted]] >> > >> > _______________________________________________ >> > R-sig-ecology mailing list >> > R-sig-ecology@r-project.org >> > https://stat.ethz.ch/mailman/listinfo/r-sig-ecology >> > >> >> >> -- >> Péter Sólymos, PhD >> Senior Statistical Ecologist >> soly...@ualberta.ca 780-492-8534 >> Alberta Biodiversity Monitoring Institute http://www.abmi.ca >> Boreal Avian Modelling Project http://www.borealbirds.ca >> >> [[alternative HTML version deleted]] >> >> _______________________________________________ >> R-sig-ecology mailing list >> R-sig-ecology@r-project.org >> https://stat.ethz.ch/mailman/listinfo/r-sig-ecology >> > -- Péter Sólymos, PhD Senior Statistical Ecologist soly...@ualberta.ca 780-492-8534 Alberta Biodiversity Monitoring Institute http://www.abmi.ca Boreal Avian Modelling Project http://www.borealbirds.ca [[alternative HTML version deleted]] _______________________________________________ R-sig-ecology mailing list R-sig-ecology@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-ecology
