Chao1 Estimator
index_chao1(x, ...)# S4 method for numeric
index_chao1(x, unbiased = FALSE, improved = FALSE, na.rm = FALSE, ...)
A numeric vector.
N. Frerebeau
Chao, A. (1984). Nonparametric Estimation of the Number of Classes in a Population. Scandinavian Journal of Statistics, 11(4), 265-270.
Chiu, C.-H., Wang, Y.-T., Walther, B. A. & Chao, A. (2014). An improved nonparametric lower bound of species richness via a modified good-turing frequency formula. Biometrics, 70(3), 671-682. tools:::Rd_expr_doi("10.1111/biom.12200").
Other alpha diversity measures:
index_ace(),
index_baxter(),
index_berger(),
index_boone(),
index_brillouin(),
index_chao2(),
index_hurlbert(),
index_ice(),
index_margalef(),
index_mcintosh(),
index_menhinick(),
index_shannon(),
index_simpson(),
index_squares(),
observed()