[R-sig-eco] Diversity on standardised densities in R

[Vít Syrovátka]

Hi,

vegan::rrarefy() is the right way to do this.

However, I can't imagine, how to take 50 random individuals from a 
sample with less then 50 individuals.
One doesn't know, what species would be collected in case of a larger 
sampling effort, R doesn't know either.
I would suggest doing this only for samples with more individuals, or 
taking a smaller number of individuals.

Hope that helps,
Vit

Dne 2013-10-24 21:08, Paris napsal:
> By the way, I think I could use (if Zoop tha name of the dataset)
> rrarefy(Zoop, sample=50).
> However, in this case it will not allow me since there are samples 
> with zero
> individuals.
> Even if I delete those, there will be some with less than 50 indiv. 
> But I
> would prefer to standardise effort for 50 individuals. This function, 
> or at
> least in this form, does not allow that.
> 
> 
> 
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