observation_impute_cpp_simple

internal

It was developed as a tool for exploring 'PPTreereg' (Projection Pursuit TREE of REGression).
It uses various projection pursuit indexes and 'XAI' (eXplainable Artificial Intelligence) methods to help
understand the model by finding connections between the input variables and prediction values of the model.
The 'KernelSHAP' (Aas, Jullum and Løland (2019) <arXiv:1903.10464>) algorithm was modified to fit ‘PPTreereg’,
and some codes were modified from the 'shapr' package (Sellereite, Nikolai, and Martin Jullum (2020) <doi:10.21105/joss.02027>).
The implemented methods help to explore the model at the single instance level as well as at the whole dataset level.
Users can compare with other machine learning models by applying it to the 'DALEX' package of 'R'.

HyunSun Cho

PPtreeregViz

Projection Pursuit Regression Tree Visualization

Eun-Kyung Lee

Nikolai Sellereite

Martin Jullum

Annabelle Redelmeier

Norsk Regnesentral 

observation_impute_cpp_simple function

<dl><dt>xbar</dt>
<dd>mean of each leaf.</dd>
<dt>index_simple</dt>
<dd>Positive integer.</dd>
<dt>xtest</dt>
<dd>Numeric matrix. Represents a single test observation.</dd>
<dt>S</dt>
<dd>Integer matrix of dimension <code>n_combinations x m</code>, where <code>n_combinations</code> equals
the total number of sampled/non-sampled feature combinations and <code>m</code> equals
the total number of unique features. Note that <code>m = ncol(xtrain)</code>. See details
for more information.</dd></dl>

Arguments

Author

Get imputed data — observation_impute_cpp_simple

<dl>

<dt>xbar</dt>
<dd>mean of each leaf.</dd>


<dt>index_simple</dt>
<dd>Positive integer.</dd>


<dt>xtest</dt>
<dd>Numeric matrix. Represents a single test observation.</dd>


<dt>S</dt>
<dd>Integer matrix of dimension <code>n_combinations x m</code>, where <code>n_combinations</code> equals
the total number of sampled/non-sampled feature combinations and <code>m</code> equals
the total number of unique features. Note that <code>m = ncol(xtrain)</code>. See details
for more information.</dd>

</dl>

Get imputed data

observation_impute_cpp_simple: Get imputed data

Description

Usage

Value

Arguments

Author