sraMakeObject

The content of an object of class <code>srafit</code> correponding to several models is very similar; this function initializes a new object and performs basic instructions.

 internal

Artificial selection through selective breeding is an efficient way to induce changes in traits of interest in experimental populations. This package (sra) provides a set of tools to analyse artificial-selection response datasets. The data typically feature for several generations the average value of a trait in a population, the variance of the trait, the population size and the average value of the parents that were chosen to breed. Sra implements two families of models aiming at describing the dynamics of the genetic architecture of the trait during the selection response. The first family relies on purely descriptive (phenomenological) models, based on an autoregressive framework. The second family provides different mechanistic models, accounting e.g. for inbreeding, mutations, genetic and environmental canalization, or epistasis. The parameters underlying the dynamics of the time series are estimated by maximum likelihood. The sra package thus provides (i) a wrapper for the R functions mle() and optim() aiming at fitting in a convenient way a predetermined set of models, and (ii) some functions to plot and analyze the output of the models.

Arnaud Rouzic

Selection Response Analysis

sraMakeObject function

<dl> <dt>sradata</dt>
<dd>A data object generated by <code>sraData</code>.</dd> <dt>model</dt>
<dd>The result of the call of <code>mle</code>.</dd> <dt>start</dt>
<dd>The list of the starting values (for the function to know which parameters were active).</dd> <dt>fixed</dt>
<dd>The list of the fixed values.</dd> <dt>FUNtimeseries</dt>
<dd>The time series function, one among those listed in <code>sraAutoregTimeseries</code>.</dd></dl>

Arguments

Creates an object of class "srafit" (internal function) — sraMakeObject

<dl>

 <dt>sradata</dt>
<dd>A data object generated by <code>sraData</code>.</dd>

 <dt>model</dt>
<dd>The result of the call of <code>mle</code>.</dd>

 <dt>start</dt>
<dd>The list of the starting values (for the function to know which parameters were active).</dd>

 <dt>fixed</dt>
<dd>The list of the fixed values.</dd>

 <dt>FUNtimeseries</dt>
<dd>The time series function, one among those listed in <code>sraAutoregTimeseries</code>.</dd>

</dl>

sraMakeObject: Creates an object of class "srafit" (internal function)

Description

Usage

Value

Arguments

See Also