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HOIF 0.2.0

First CRAN submission.

Adaptation to ustats (>= 0.1.5)

• The Python dependencies (u-stats, numpy, torch) of the ‘ustats’ backend are now provisioned automatically on first use (via reticulate >= 1.41 and reticulate::py_require() declared by ‘ustats’), so most users need no manual setup. The installation documentation (README, vignette) was rewritten accordingly, covering the three setup paths: automatic, ustats::setup_ustats() (CPU-only PyTorch by default, gpu = TRUE for CUDA), and bring-your-own-environment.
• hoif_ate() and compute_hoif_estimators() gain a dtype argument (“float32”/“float64”, default NULL = automatic) that is passed through to ustats::ustat() to control the numeric precision of the Python backend.
• The Remotes: field and the package-level Config/reticulate block were removed: ‘ustats’ is now obtained from CRAN and declares its own Python requirements.

Bug fixes

• transform_covariates() no longer fails with “object ‘k’ not found” for method = "splines" and method = "fourier" (the basis dimension argument was renamed to basis_dim without updating the function body). It now also validates basis_dim and gives an informative error when it is missing or too small.
• The Moore-Penrose fallback in compute_gram_inverse() now checks that ‘MASS’ is installed (it is a suggested package) and gives an informative error if not.
• print.hoif_ate() returns its argument invisibly, as is customary for print methods.

Documentation

• All exported functions now have executable examples; examples and tests that need Python are guarded so that the package can be checked without a Python runtime (the pure R backend is exercised instead).
• Added a tests/testthat.R runner (previously the test suite was not run by R CMD check) plus new pure R regression tests.
• The vignette was moved to the standard vignettes/ directory, its code chunks are no longer evaluated at build time (the Python backend is not available on build machines), and the references were corrected.
• Startup message points users to ustats::check_ustats_setup() and the pure_R_code = TRUE fallback.

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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