C and C++ cover the classic extension story. Rust through extendr and Savvy brings memory safety to the table. Both are modern, both are performant. Neither fits the R C API boundary as naturally as a language designed to treat C interop as a first-class feature. Early observations from zigr: six backends, 23 tasks, and a case for Zig as the missing option.

A primer on fuzzy (soft) clustering, covering the Fuzzy C-Means algorithm with implementations in R and Python, the math behind membership coefficients, and how it differs from hard clustering.