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robscale 0.1.5

• CRAN: Removed #pragma GCC diagnostic ignored "-Wdeprecated-volatile" from src/qn_estimator.cpp, src/sn_estimator.cpp, and src/qnsn_sort_utils.h to resolve the “pragmas suppressing diagnostics” NOTE requested by CRAN maintainers.
• Windows: Added configure.win and cleanup.win to suppress spurious win-builder warnings about missing Windows configuration.
• CI: Added GitHub Actions R-CMD-check workflow with multi-platform matrix (Windows, macOS, Ubuntu) as independent evidence of Windows compilation.
• Portability: Fixed uninitialized NEON register in qnsn_kernels.h that Clang 17 on macOS promoted to a compilation WARNING.
• Build: Switched RcppParallel::LdFlags() to the canonical RcppParallel::RcppParallelLibs() in Makevars.win and Makevars.in.

robscale 0.1.4

• Portability: Fixed macOS (Apple Silicon) compilation error by switching to the more portable <Accelerate/Accelerate.h> include and resolving a symbol conflict with R’s COMPLEX type.
• Portability: Restored explicit CXX_STD = CXX17 in Makevars (required by CRAN policy for packages using C++17 features).
• Portability: Removed non-portable GCC pragmas to silence warnings on Clang (win-builder Debian).
• CRAN: Retained GNU make in SystemRequirements ($(shell) is a GNU extension used for RcppParallel linking).
• CRAN: Added inst/WORDLIST to whitelist technical terms from aspell.
• CRAN: Quoted ‘Qn’ and ‘Sn’ in DESCRIPTION to satisfy metadata checks.
• Build: Resolved duplicate -ltbb flag from Makevars which caused warnings on some macOS configurations.

robscale 0.1.3

• Added high-efficiency scale estimators: qn() and sn() (Rousseeuw & Croux, 1993) with specialized sorting network kernels and cache-aware parallelization.
• Added robustbase to Suggests for reference and benchmarking.
• Added documentation examples for all five exported functions.
• Performance optimizations: Fixed configure script to ensure that hardware-specific SIMD flags (e.g., -mavx2) are strictly opt-in via ROBSCALE_FAST=1.

robscale 0.1.1

• Consistent NA handling: adm() now raises an error when na.rm = FALSE and NAs are present, matching robLoc() and robScale() behavior.
• Replaced manual new[]/delete[] with std::unique_ptr for RAII memory safety in all C++ estimator functions.
• Removed unused scoring-iteration constants (PSI_NORM_CONST, INV_PSI_NORM_CONST) from robust_core.h.
• Hoisted loop-invariant half_inv_s above the Newton–Raphson loop in rob_loc.cpp.
• Added Mermaid algorithm flowcharts for robLoc and robScale to README.
• Expanded test suite: explicit-center tests for adm(), maxit edge cases for robLoc() and robScale(), sorting network verification for n = 2–8.
• Added cph role to Authors@R in DESCRIPTION.

robscale 0.1.0

Initial release.

• Three functions: adm(), robLoc(), and robScale() implementing the robust location and scale M-estimators of Rousseeuw & Verboven (2002) for very small samples.
• API-compatible drop-in replacement for the revss package.
• C++17 implementation via Rcpp with:
  • Newton–Raphson iteration for location (quadratic convergence).
  • Algebraic tanh(x/2) identity for the logistic psi function with platform-vectorized bulk evaluation (Apple Accelerate on macOS, OpenMP SIMD hints on Linux).
  • Floyd–Rivest O(n) selection for median computation.
  • Optimal sorting networks for n <= 8.
  • Stack-allocated arena buffers (zero heap allocation for n <= 512).
• Numerical equivalence with revss verified across 5,400 systematic comparisons (tolerance: sqrt(.Machine$double.eps)).

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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