Dear Gavin, Thank you very much for your fast answer and your explanations.
Yes, you are right; it is in the Vegan package and I would like to run a DCCA to remove the arch effect that I obtain in a CCA. I am working with samples stations where I have my species identified and environmental variables and the idea is to do an ordination related to the environmental variables to study the assemblages that I have. I have thought in others methods too, but I am very interesting in the CCA and it is difficult to reduce so much the number of terms, because I only have 6 environmental variables (only 6) and the most important (depth) is the responsible of this arch effect. I have heard that CANOCO has implemented the DCCA, but as I have began to work with R some months ago and I am trying to run all my analysis with R I was interested in to know if there was any function to do this. Could be a good idea to post that message on the R-SIG-Ecology list too. Again thank you very much, Javier -----Mensaje original----- De: Juan José Santos Blanco Enviado el: martes, 20 de diciembre de 2011 9:32 Para: r-help@r-project.org CC: Javier Murillo Pérez Asunto: any DCCA function in R? Dear members, I am performing multivariate analysis on marine benthic populations using R. At first glance I found ca and VEGANO packages to be the suitable for the task, but neither has incorporated Detrended Canonical Correspondence Analysis (DCCA), which is just the method I want to apply on my data. I've looked for alternative packages containing the method, but my suspicion is that there is not DCCA availability for R users. Does anyone have better news for me? Javier Murillo PHD Candidate IEO-CO VIGO ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
