fisher.alpha: Parameter alpha in the logseries estimator

In preseqR: Predicting Species Accumulation Curves

Description

fisher.alpha estimates the parameter alpha in the logseries estimator by Fisher, R. A., et al. (1943) based on an initial sample.

Usage

fisher.alpha(n)

Arguments

n	A two-column matrix. The first column is the frequency j = 1,2,…; and the second column is N_j, the number of species with each species represented exactly j times in the initial sample. The first column must be sorted in an ascending order.

Value

A double, the estimated value of the parameter alpha

Author(s)

Chao Deng

References

Fisher, R., Corbet, A., & Williams, C. (1943). The Relation Between the Number of Species and the Number of Individuals in a Random Sample of an Animal Population. Journal of Animal Ecology, 12(1), 42-58. doi:10.2307/1411

Examples

## load library
library(preseqR)

## import data
data(WillButterfly)

## estimating alpha
fisher.alpha <- fisher.alpha(WillButterfly)

Example output

There were 20 warnings (use warnings() to see them)

preseqR documentation built on May 2, 2019, 6:39 a.m.