phi.range

User-guided approach to obtain a relevance function for certain intervals of the target variable when the option of range is chosen in function phi.control, i.e. users define the relevance of values for which it is known

internal

Imbalanced domain learning has almost exclusively focused on solving
classification tasks, where the objective is to predict cases labelled with a
rare class accurately. Such a well-defined approach for regression tasks lacked
due to two main factors. First, standard regression tasks assume that each value
is equally important to the user. Second, standard evaluation metrics focus on
assessing the performance of the model on the most common cases. This package
contains methods to tackle imbalanced domain learning problems in regression
tasks, where the objective is to predict extreme (rare) values.
The methods contained in this package are: 1) an automatic and non-parametric
method to obtain such relevance functions; 2) visualisation tools; 3) suite of
evaluation measures for optimisation/validation processes; 4) the squared-error
relevance area measure, an evaluation metric tailored for imbalanced regression tasks.
More information can be found in Ribeiro and Moniz (2020) <doi:10.1007/s10994-020-05900-9>.

Nuno Moniz

IRon

Solving Imbalanced Regression Tasks

Rita P. Ribeiro

Miguel Margarido

phi.range function

<dl><dt>y</dt>
<dd>The target variable of a given data set</dd>
<dt>control.pts</dt>
<dd>Parameter representing a 3-column matrix of y-value, corresponding relevance value (between 0 and 1), and the derivative of such relevance value, allowing users to specify the known relevance at given target values</dd>
<dt>...</dt>
<dd>Additional parameters</dd></dl>

Arguments

Custom Relevance Function — phi.range

<dl>

<dt>y</dt>
<dd>The target variable of a given data set</dd>


<dt>control.pts</dt>
<dd>Parameter representing a 3-column matrix of y-value, corresponding relevance value (between 0 and 1), and the derivative of such relevance value, allowing users to specify the known relevance at given target values</dd>


<dt>...</dt>
<dd>Additional parameters</dd>

</dl>

phi.range: Custom Relevance Function

Description

Usage

Value

Arguments