checks

Post checks for PCA and bootstrapping

A framework used to detect and handle outliers during data analysis workflows. Outlier detection is a statistical concept with applications in data analysis workflows, highlighting records that are suspiciously high or low. Outlier detection in distribution models was initiated by Chapman (1991) (available at <https://www.researchgate.net/publication/332537800_Quality_control_and_validation_of_point-sourced_environmental_resource_data>), who developed the reverse jackknifing method. The concept was further developed and incorporated into different R packages, including 'flexsdm' (Velazco et al., 2022, <doi:10.1111/2041-210X.13874>) and 'biogeo' (Robertson et al., 2016 <doi:10.1111/ecog.02118>). We compiled various outlier detection methods obtained from the literature, including those elaborated in Dastjerdy et al. (2023) <doi:10.3390/geotechnics3020022> and Liu et al. (2008) <doi:10.1109/ICDM.2008.17>. In this package, we introduced the ensembling aspect, where multiple outlier detection methods are used to flag the record as either an absolute outlier. The concept can also be applied in general data analysis, as well as during the development of species distribution models.

Anthony Basooma

specleanr

Detecting Environmental Outliers in Data Analysis Pipelines

Thomas Hein

Astrid Schmidt-Kloiber

Merret Buurman

Sami Domisch

Martin Tschikof

Florian Borgwardt

checks function

<dl><dt>y</dt>
<dd>list of PCA and bootstrapped output.</dd>
<dt>nboots</dt>
<dd>Number of bootstrapping</dd>
<dt>th</dt>
<dd>threshold for identifying absolute outlier from bootstrapped samples.</dd>
<dt>var</dt>
<dd>variable of interest.</dd></dl>

Arguments

Post checks for PCA and bootstrapping — checks

<dl>

<dt>y</dt>
<dd>list of PCA and bootstrapped output.</dd>


<dt>nboots</dt>
<dd>Number of bootstrapping</dd>


<dt>th</dt>
<dd>threshold for identifying absolute outlier from bootstrapped samples.</dd>


<dt>var</dt>
<dd>variable of interest.</dd>

</dl>

checks: Post checks for PCA and bootstrapping

Description

Usage

Arguments