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rollshap: Rolling Shapley Values

Analytical computation of rolling and expanding Shapley values for time-series data. The 'rollshap' package decomposes the coefficient of determination (R-squared) of a linear regression into nonnegative contributions from each explanatory variable using the Shapley value from cooperative game theory (Shapley, 1953, <doi:10.1515/9781400881970-018>). For each window, the exact Shapley value is computed by fitting all subsets of the explanatory variables and averaging the marginal contribution to R-squared across all orderings, which returns an order-invariant attribution that sums to the full-model R-squared. Use cases include variable importance, factor attribution, and feature selection in time-series regression. The package supports rolling and expanding windows, weights, and handling of missing values via 'min_obs', 'complete_obs', and 'na_restore' arguments. The implementation uses the online and offline algorithms from the 'roll' package to compute rolling and expanding cross-products efficiently with parallelism across columns and windows provided by 'RcppParallel'.

Version: 1.0.1
Depends: R (≥ 3.0.2)
Imports: Rcpp, RcppParallel
LinkingTo: Rcpp, RcppArmadillo, RcppParallel, roll (≥ 1.1.7)
Suggests: covr, testthat, zoo, relaimpo, roll
Published: 2026-05-21
DOI: 10.32614/CRAN.package.rollshap (may not be active yet)
Author: Jason Foster [aut, cre]
Maintainer: Jason Foster <jason.j.foster at gmail.com>
BugReports: https://github.com/jasonjfoster/rollshap/issues
License: GPL-2 | GPL-3 [expanded from: GPL (≥ 2)]
URL: https://github.com/jasonjfoster/rollshap
NeedsCompilation: yes
SystemRequirements: GNU make
Materials: README
CRAN checks: rollshap results

Documentation:

Reference manual: rollshap.html , rollshap.pdf

Downloads:

Package source: rollshap_1.0.1.tar.gz
Windows binaries: r-devel: rollshap_1.0.1.zip, r-release: not available, r-oldrel: rollshap_1.0.1.zip
macOS binaries: r-release (arm64): rollshap_1.0.1.tgz, r-oldrel (arm64): rollshap_1.0.1.tgz, r-release (x86_64): not available, r-oldrel (x86_64): not available

Linking:

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These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
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