find_alphas

This function finds the value of alpha using the <code>uniroot</code> method for a given beta and a vector
of fertility rates. If the function values at the interval ends do not have opposite signs,
it returns the closest value to 0.

Provides tools to calculate the alpha parameter of the Weibull distribution, given beta
and the age-specific fertility of a species, so that the population remains stable and stationary.
Methods are inspired by "Survival profiles from linear models versus Weibull models: Estimating stable
and stationary population structures for Pleistocene large mammals" (Martín-González et al. 2019)
<doi:10.1016/j.jasrep.2019.03.031>.

David Palacios-Morales

StablePopulation

Calculates Alpha for a Stable Population

Guillermo Rodríguez-Gómez

Jesús A. Martín-González

find_alphas function

<dl><dt>beta</dt>
<dd>A numeric value representing the beta parameter of Weibull distribution.</dd>
<dt>fertility_rates</dt>
<dd>A numeric vector containing the fertility rates.</dd>
<dt>tol</dt>
<dd>A numeric value representing the tolerance for the <code>uniroot</code> method. Default is <code>1e-22</code>.</dd></dl>

Arguments

Function to find the value of alpha — find_alphas

<dl>

<dt>beta</dt>
<dd>A numeric value representing the beta parameter of Weibull distribution.</dd>


<dt>fertility_rates</dt>
<dd>A numeric vector containing the fertility rates.</dd>


<dt>tol</dt>
<dd>A numeric value representing the tolerance for the <code>uniroot</code> method. Default is <code>1e-22</code>.</dd>

</dl>

find_alphas: Function to find the value of alpha

Description

Usage

Value

Arguments

Examples