check_Xdir

Internal: check for valid computational direction arguments

internal

Provides methods for interpreting CoDa (Compositional Data) regression models along the lines of "Pairwise share ratio interpretations of compositional regression models" (Dargel and Thomas-Agnan 2024) <doi:10.1016/j.csda.2024.107945>.
The new methods include variation scenarios, elasticities, elasticity differences and share ratio elasticities.
These tools are independent of log-ratio transformations and allow an interpretation in the original space of shares.
'CoDaImpact' is designed to be used with the 'compositions' package and its ecosystem.

Lukas Dargel

CoDaImpact

Interpreting CoDa Regression Models

Christine Thomas-Agnan

Rodrigue Nasr

Sijia Pan

Iban Rendo Barreiro

Shuyao Li

check_Xdir function

<dl><dt>Xdir</dt>
<dd>a character or numeric indicating the direction</dd>
<dt>Xopts</dt>
<dd>a character indicating the names of the vertices</dd>
<dt>normalize</dt>
<dd>a logical if true Xdir is normalized to have an Aitchison norm of 1</dd></dl>

Arguments

Author

Internal: check for valid computational direction arguments — check_Xdir

<dl>

<dt>Xdir</dt>
<dd>a character or numeric indicating the direction</dd>


<dt>Xopts</dt>
<dd>a character indicating the names of the vertices</dd>


<dt>normalize</dt>
<dd>a logical if true Xdir is normalized to have an Aitchison norm of 1</dd>

</dl>

check_Xdir: Internal: check for valid computational direction arguments

Description

Usage

Value

Arguments

Author