Calculate the additional number of samples to required to observe a
given proportion of the total number of species.
Usage
num.samples.required(g, f, f0.func, ...)
Arguments
g
propotion of total number of species.
f
a vector of species frequencies where f[i] is the number of
species represented by only i samples.
f0.func
a function that computes the number of unobserved
species (f0).
...
other arguments to f0.func.
Value
a vector containing of the estimated additional number of samples
(m.g) required to observe g percent of the total number
of species.
References
Eqn 12 in Chao, A., R.K. Colwell, C.-W. Lin, and N.J. Gotelli. 2009.
Sufficient sampling for asymptotic minimum species richness estimators.
Ecology 90(4):1125-1133.
Eqn 11 in Colwell, R.K., A. Chao, N.J. Gotelli, S.-Y. Lin,
C.X. Mao, R.L. Chazdon, and J.T. Longino. 2012. Models and estimators
linking individual-based and sample-based rarefaction, extrapolation and
comparison of assemblages. Journal of Plant Ecology 5(1):3-21.