ggoutliers

Visualize the outliers identified by each method

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

ggoutliers function

<dl><dt>x</dt>
<dd>. the datacleaner object</dd>
<dt>select</dt>
<dd><code>vect</code>. Enter selected groups to be displayed especially if they are greater than 10.
For example if the species are more than 10, the plot will be done in batches.</dd>
<dt>color</dt>
<dd><code>string</code>. Color of the bars. Default is <code>grey</code>.</dd>
<dt>desc</dt>
<dd><code>logical</code> To either arrange the bars in ascending or descending order.</dd>
<dt>ncol, nrow</dt>
<dd><code>integer</code> If number of groups are greater than 1, then number of rows and columns can be set.
Check ggplot2 facet parameters on how the columns are set.</dd></dl>

Arguments

Visualize the outliers identified by each method — ggoutliers

<dl>

<dt>x</dt>
<dd>. the datacleaner object</dd>


<dt>select</dt>
<dd><code>vect</code>. Enter selected groups to be displayed especially if they are greater than 10.
For example if the species are more than 10, the plot will be done in batches.</dd>


<dt>color</dt>
<dd><code>string</code>. Color of the bars. Default is <code>grey</code>.</dd>


<dt>desc</dt>
<dd><code>logical</code> To either arrange the bars in ascending or descending order.</dd>


<dt>ncol, nrow</dt>
<dd><code>integer</code> If number of groups are greater than 1, then number of rows and columns can be set.
Check ggplot2 facet parameters on how the columns are set.</dd>

</dl>

ggoutliers: Visualize the outliers identified by each method

Description

Usage

Value

Arguments