View source: R/num.samples.required.R
num.samples.required | R Documentation |
Calculate the additional number of samples (individuals) to required to observe a given proportion of the total number of species.
num.samples.required(g, f, f0.func, ...)
g |
propotion of total number of species. |
f |
a vector of species frequencies where |
f0.func |
a function that computes the number of unobserved species (f0). |
... |
other arguments to |
a vector containing of the estimated additional number of samples
(m.g
) required to observe g
percent of the total number
of species.
Eric Archer eric.archer@noaa.gov
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.
data(osa.old.growth)
f <- expand.freqs(osa.old.growth)
num.samples.required(0.6, f = f, f0.func = Chao1)
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