ChaoSpecies: Etimation of species richness
In JohnsonHsieh/SpadeR: Species Prediction and Diversity Estimation with R

Description Usage Arguments Value Author(s) Examples

ChaoSpecies is a function to estimate species richness in one community.

1 2	ChaoSpecies(data, datatype = c("abundance", "incidence"), k = 10, conf = 0.95)

`data`	a vector of species sample frequencies (for abundance data), or incidence-based sample frequencies (1st entry must be the number of sampling unit).
`datatype`	a character of data type,"abundance" or "incidence".
`k`	cut-off point. It is a value that separates frequency counts into abundant and rare groups
`conf`	a confidence coefficient between 0 and 1.

a vector of species richness estimator and its confidence interval.

Anne Chao, K. H. Ma and T. C. Hsieh

data(SpecDemoAbu)
ChaoSpecies(SpecDemoAbu, datatype="abundance", k = 10, conf = 0.95)
data(SpecDemoInci)
ChaoSpecies(SpecDemoInci, datatype="incidence", k = 10, conf = 0.95)