NEWS

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polykde 1.2.1 (2026-07-26)

• Unrandomize the tests in tests_bwd.R, tests_distr.R, tests_grad_hess.R, tests_kde.R, tests_samplers.R, and tests_tests.R to avoid spurious failures on some platforms.

polykde 1.2.0 (2026-07-25)

• Add arcsinh to bw_cv_polysph() to handle high-dimensional data.
• Move Bessel from Suggests to Imports.
• Fix the Monte Carlo LSCV loss in bw_cv_polysph(exact_vmf = FALSE), which mixed densities with respect to the Lebesgue and uniform measures.
• Extend and speed up the spline approximation of the Bessel functions used by fast_log_c_vMF(): the tabulated orders now reach nu = 24.5, interpolation is done on log(x), small arguments use an exact series, and non-tabulated orders fall back to besselI() instead of erroring.
• Robustify the JSD test in hom_test_polysph() against non-finite values; use the standard permutation p-value (1 + #{T* >= T}) / (B + 1).
• Fix the normalizing constants of the Epanechnikov and softplus product kernels in grad_hess_kde_polysph().
• Fix proj_grad_kde_polysph() with sparse = TRUE, which could request too few eigenvalues for small r.
• Accept a length-r vector kappa for one-component mixtures in d_mvmf_polysph(), r_mvmf_polysph(), and mise_vmf_polysph().
• Restore the user's random seed on exit whenever seed_mc, seed_psi, or seed_jsd are given.
• Validate inputs in log_cv_kde_polysph(), bw_lcv_min_epa(), and proj_polysph().
• Add a package logo.
• And the reference García-Portugués and Meilán-Vila (2023) (doi:10.1007/978-3-031-32729-2_4) to CITATION.
• Documentation improvements.

polykde 1.1.7 (2025-07-27)

• Add d_mvmf_polysph() and r_mvmf_polysph() to handle mixtures of vMF distributions on polyspheres.
• Add exact ISE for vMF distributions.
• Expand support of fast_log_c_vMF() to large orders.
• Add Hammer projection convenience hammer_to_sph() and fib_latt().
• Update reference García-Portugués and Meilán-Vila (2025) to the published version.

polykde 1.1.4 (2025-05-29)

• Add hippocampus dataset to give replicability to García-Portugués and Meilán-Vila (2024) (doi:10.48550/arXiv.2411.04166).

polykde 1.1.3 (2025-04-15)

• Add cross-validation bandwidths with exact loss for vMF distributions in bw_cv_polysph().
• Add fast_log_c_vMF() as a faster version of rotasym::c_vMF().
• Add exact MISE for vMF distributions.
• Fix error in r-devel-linux-x86_64-fedora-clang reported on 2025-04-15.

polykde 1.0.0 (2025-02-17)

• Initial release.