R: Parameter alpha in the logseries estimator

fisher.alpha {preseqR} | R Documentation

## Parameter alpha in the logseries estimator

### 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)

[Package preseqR version 4.0.0 Index]