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shapley
View on CRAN: Click
here
Download and install shapley package within the R console
Install from CRAN:
install.packages("shapley")
Install from Github:
library("remotes")
install_github("cran/shapley")
Install by package version:
library("remotes")
install_version("shapley", "0.1")
Attach the package and use:
library("shapley")
Maintained by
E. F. Haghish
[Scholar Profile | Author Map]
[Scholar Profile | Author Map]
All associated links for this package
First Published: 2023-11-07
Latest Update: 2023-11-07
Description:
This R package introduces an innovative method for calculating SHapley Additive exPlanations (SHAP) values
for a grid of fine-tuned base-learner machine learning models as well as stacked ensembles, a method not
previously available due to the common reliance on single best-performing models. By integrating the weighted
mean SHAP values from individual base-learners comprising the ensemble or individual base-learners in a tuning grid search,
the package weights SHAP contributions according to each model's performance, assessed by the Area Under the
Precision-Recall Curve (AUCPR) for binary classifiers (currently implemented). It further extends this framework to
implement weighted confidence intervals for weighted mean SHAP values, offering a more comprehensive and robust
feature importance evaluation over a grid of machine learning models, instead of solely computing SHAP values for
the best-performing model. This methodology is particularly beneficial for addressing the severe class imbalance
(class rarity) problem by providing a transparent, generalized measure of feature importance that mitigates the
risk of reporting SHAP values for an overfitted or biased model and maintains robustness under severe class imbalance,
where there is no universal criteria of identifying the absolute best model. Furthermore, the package implements
hypothesis testing to ascertain the statistical significance of SHAP values for individual features, as well as
comparative significance testing of SHAP contributions between features. Additionally, it tackles a critical
gap in feature selection literature by presenting criteria for the automatic feature selection of the most important
features across a grid of models or stacked ensembles, eliminating the need for arbitrary determination of the
number of top features to be extracted. This utility is invaluable for researchers analyzing feature significance,
particularly within severely imbalanced outcomes where conventional methods fall short. In addition, it is also
expected to report democratic feature importance across a grid of models, resulting in a more comprehensive and
generalizable feature selection. The package further implements a novel method for visualizing SHAP values both
at subject level and feature level as well as a plot for feature selection based on the weighted mean SHAP ratios.
How to cite:
E. F. Haghish (2023). shapley: Weighted Mean SHAP for Feature Selection in ML Grid and Ensemble. R package version 0.1, https://cran.r-project.org/web/packages/shapley
Previous versions and publish date:
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Other R packages that shapley depends,
imports, suggests or enhances
Functions, R codes and Examples using
the shapley R package
Some associated functions: h2o.get_ids . normalize . shapley . shapley.plot . shapley.test . shapley.top . test .
Some associated R codes: h2o.get_ids.R . normalize.R . shapley.R . shapley.plot.R . shapley.test.R . shapley.top.R . test.R . Full shapley package functions and examples
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