[R-sig-eco] Species accumulation curve: rarefaction

[Jari Oksanen]

On Tue, 2011-01-18 at 14:11 +0200, Anne-Christine Mupepele wrote:
> Dear all,
> 
> I want to create a species accumulation curve using the method
> "rarefaction".
> In the helpfile to the function specaccum, it is written:
> ""rarefaction" finds the mean when accumulating individuals instead of
> sites." which is exactly what I want.
> However if I use plot(specaccum(x,method="rarefaction")), I will get
> expected species per sites, with sites on the x-axis instead of
> individuals .
> How can I get a curve drawn with expected species on the y axis and
> individuals on the x axis?
> 
Anne,

The function returns the number or individuals as item
"invidividuals" (yes, there really seems to be a typo that I'll
correct!). You should use that as the x-axis instead of the default
"sites". You cannot use plot.specaccum() function directly, but you can
look at the model there.

Cheers, Jari Oksanen