vegan RDA triplot species arrows
Jari Oksanen <jari.oksanen at oulu.fi> writes:
In any case, if you are interested I would be happy to attempt to add code to plot.cca to do what I'd prefer. If not, no worries, I can make a wrapper function to get what I want without modifying vegan.
Vegan has two general design principles: (1) there are design principles, (2) they can be overruled. I'll be happy to accept plot.cca amendment -- providing they are "acceptable".
I'll see what I can do, keeping in mind the considerations you mention.
Finally a comment about arrows as a convention in RDA: I disagree -- it is not a convention in RDA, but a convention in CanoDraw and its heirs. I never liked it when CanoDraw introduced this for the reasons I gave earlier (messy). Points were quite common in displaying PCA results even earlier, although some people used arrows, especially with small data sets.
That's interesting to know, thanks. My apologies for conflating my textbook with universal standard practice! Cheers, Tyler