search for: ordihull

...comm.mds is the ordination of the community matrix comm.mat, FD.mat is the species attributes matrix. comm.mds<- metaMDS(comm.mat, distance = "euclidean", k = 2, zerodist = "add", noshare = 0) plot(comm.mds, type="p", display="species") with(FD.mat, ordihull(comm.mds.t, feeding, show.groups = "1", col = "yellow", lty = 1, lwd=3)) with(FD.mat, ordihull(comm.mds.t, feeding, show.groups = "2", col = "black", lty = 1, lwd=3)) t with(FD.mat, ordihull(comm.mds.t, feeding, show.groups = "3", col = &q...

...uot;AXIS 2") points(vare.cca,display='species') Now, I want to add to this graph a standard error in 'x' and 'y' direction. How can I add it? I tried different options but I do not get it. It will be just like the function ordiellipse of ellipse library and others like ordihull of vegan library, but without add any factor level. The program CAP of Anderson realice this kind of output and I am wondering if in R exists some function implemented that deals with it. Some examples of these graphics will be found in Quero et al., 2008 Basic and Applied Ecology 9: 635-644; Maest...

...'t what I'm looking for.  If I go ahead and delete the column "row.names" from my data frames (i.e. removing it from turtles and turtles.env), I don't believe that the analysis is performed correctly. The two species differ significantly in most of their measurements, but the ordihull() and ordispider() commands show them overlapping almost completely. I think that I'm missing something pretty basic about inputting and formatting this data for this analysis. Can anyone offer a suggestion on where I'm going astray? I can send a copy of the data if anyone wants to look at...

Is there an option to draw concentration ellipses in biplots ? It seems really nice to summarize large number of points of each group. Cheers../ Murli