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
1 2 3 4 | data(SpecDemoAbu)
ChaoSpecies(SpecDemoAbu, datatype="abundance", k = 10, conf = 0.95)
data(SpecDemoInci)
ChaoSpecies(SpecDemoInci, datatype="incidence", k = 10, conf = 0.95)
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