[R] discerning species by color in cca biplot

Gavin Simpson gavin.simpson at ucl.ac.uk
Sat Aug 14 14:30:56 CEST 2010

If you only have seven species, why not draw the label for the species
(the names() component of your data) at the species score, rather than a

plot(OBJ, display = c("sites","species"), scaling = 3, type = "n")
points(OBJ, display = "sites", scaling = 3, type = "p")
points(OBJ, display = "species", scaling = 3, type = "t")

Not tested, am away at the moment but heading home. If you are still
having trouble (and I see now why you wanted matplot) then email back and
I'll given a longer example illustrating who to build up plots by hand.


> Dear List,
> I am running constrained correspondence analysis for abundance data of 7
> birds.
> However, I would like to check which bird prefers which environment
> gradient
> by showing the species with different colors of the dots in cca plot
> (package vegan).
> Please kindly help and thank you
> Elaine
> 	[[alternative HTML version deleted]]
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