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...ion which works with NMDS or does anybody know how to modify the predict function so that it will work also for NMDS? Thank you very much! Kim -------- Original-Nachricht -------- > Datum: Fri, 04 Sep 2009 18:11:09 +0100 > Von: Gavin Simpson <gavin.simpson at ucl.ac.uk> > An: Kim Vanselow <Vanselow at gmx.de> > CC: r-help at r-project.org > Betreff: Re: [R] NA in cca (vegan) > On Fri, 2009-09-04 at 17:15 +0200, Kim Vanselow wrote: > > Dear all, > > I would like to calculate a cca (package vegan) with species and > > environmental data. One of these...

Dear r-helpers! How can I integrate other distances (in the form of a dist object) into function metaMDS? The problem: metaMDS needs the original data.frame for the calculation and only the default distances of function vegdist are allowed. Any suggestions are greatly appreciated! Thank you, Kim -- Jetzt kostenlos herunterladen: Internet Explorer 8 und Mozilla Firefox 3.5 - sicherer, schneller

Dear r-helpers! Jan Thiele asked r-help-list in february, but I could not find an answer to his question. I have the same problem: While preparing figures of 'envfit' plots with vegan for publication, I ran into a layout problem, that I found no solution for in the literature or the help archive: The labels of the vectors that indicate correlations of environental variables sometimes

Dear r-helpers, I want to test groups of samples for significant differences. Question: Does Group1 differ significantly from group2. This is a question to be answered by mann-whitney-u-test. I know that I can use wilcox.test with 2 samples. My problem: How can r perform the test automatically if there are more than 2 groups in my data frame. Test group1 vs. 2, 1 vs. 3, 1 vs. 4, etc. This is

...e can manually map the drives through the DOS window by typing something like this: net use z: \\<servername>\<service> This works fine and then we're able to see the drive from Explorer, and delete from Explorer as well. Any help would be greatly appreciated. Thanks!! -Zane Vanselow enaz@hotmail.com ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

...NT password? If so, do I need to add stuff to the config file regarding the domain controller? * Do the unix machine and NT machines have to have the same uid and password for each user I want this to work for? If anyone can help, it would be greatly appreciated. Thanks much people!!! -zane vanselow fcg, san francisco 415/545-0174 ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

Hi need to contact Zane Vanselow

Dear r-helpers! I want to classify my vegetation data with hierachical cluster analysis. My Dataset consist of Abundance-Values (Braun-Blanquet ordinal scale; ranked) for each plant species and relev?. I found a lot of r-packages dealing with cluster analysis, but none of them is able to calculate a distance measure for ranked data. Podani recommends the use of Goodman and Kruskals' Gamma for

Dear r-helpers, I just read in an article by Virtanen et al. (2006) where vegetation-environment relationships are studied by fitting smoothed surfaces on an NMDS ordination using GAMs (Wood 2000). The authors describe, that they used R? as goodness-of-fit statistic, which they compare to the R? of fitted vectors. Calculations were carried out using the package vegan (Oksanen). I know that I can

Dear all, I would like to calculate a cca (package vegan) with species and environmental data. One of these environmental variables is cos(EXPOSURE). The problem: for flat releves there is no exposure. The value is missing and I can't call it 0 as 0 stands for east and west. The cca does not run with missing values. What can I do to make vegan cca ignoring these missing values? Thanks a lot,

Dear R-community, dear Jari Oksanen! I use metaMDS (package vegan) to calculate NMDS. In a lot of papers I read that it is recommended to use previous best solutions as a new starting configuration to get better results and to avoid local minima. On the help page I found that a previous.best-command is already implemented in metaMDS: metaMDS(comm, distance = "bray", ...,plot = FALSE,

...cation/zip' length 1598763 bytes (1.5 Mb) URL ge?ffnet downloaded 1.5 Mb Bundel 'VR' erfolgreich ausgepackt und MD5 Summen abgeglichen Warnung: kann alte Installation von Paket 'MASS' nicht entfernen Die heruntergeladenen Pakete sind in C:\Dokumente und Einstellungen\kvanselow\Lokale Einstellungen\Temp\RtmpeIMdIP\downloaded_packages aktualisiere HTML Paketbeschreibungen > ok, MASS seems to be already installed. But I cannot run its functions and I cannot find the path: > .libPaths(MASS) Fehler in path.expand(new) : objekt "MASS" nicht gefunden What ca...

Dear r-helpers, I estimated a generalized additive model (GAM) using Hastie's package GAM. Example: gam1 <- gam(vegetation ~ s(slope), family = binomial, data=aufnahmen_0708, trace=TRUE) pred <- predict(gam1, type = "response") vegetation is a categorial, slope a numerical variable. Now I want to assess the accurancy of the model using k-fold cross validation. I found the

Dear r-helpers, I use function step.gam (package gam, T. Hastie) with several explanatory variables to build a model. Unfortunately, I obviously have too many variables. This message occurs on my 4 core 64bit machine with 8GB RAM in R2.11.1 for Windows (64bit build): Error in array(FALSE, term.lengths) : 'dim' specifies too large an array I read that this message occurs when running out