vegan RDA triplot species arrows
Gavin Simpson <gavin.simpson at ucl.ac.uk> writes:
On Wed, 2011-05-04 at 15:44 -0400, Tyler Smith wrote:
Why does vegan not plot species as arrows in plot? I know how to use scores() and arrows() to create my own arrows, but it seems odd that this feature is not built in. Is there ever a situation where species *should* be plotted as points rather than arrows?
I don't know, but it might having something to do with Jari's aversion to using linear methods for species data ;-)
Oh, right. I guess the pre-transformation of species data is still a recent development, so maybe it made sense to discourage using RDA with species as dependent variables.
More seriously, perhaps this hasn't/didn't occur to the developers, despite being the author of biplot.rda() I never got round to doing a triplot() generic and method... If you would care to offer some code it would be appreciated, otherwise I might get to take a look later in May.
Once my exams are graded, I'll take a look at the existing code and see what I can do! Cheers, Tyler