Revision history for Perl extension Math::Histo::PDL. 0.4.0 2026-09-08 - Synchronize version and dependencies with Math::Histo 0.4.0 and libhisto 0.4.0. - Require Math::Histo 0.4.0 in runtime and test prerequisites. - Add editor swap and backup file exclusion patterns to MANIFEST.SKIP. 0.3.0 2026-08-29 - Synchronize version and dependencies with Math::Histo 0.3.0 and libhisto 0.3.0. - Support weighted 1D/2D piddle ingestion and coordinate conversions with improved performance. 0.2.1 2026-08-25 - Fix test assertions on long double and quadmath Perl builds using Test2 within() floating-point tolerance. 0.2.0 2026-08-21 - Initial release of Math::Histo::PDL distribution. - Zero-copy 1D and 2D piddle ingestion via get_dataref into libhisto fill_packed_f64. - Transparent coercion for non-double data types and non-contiguous piddle slices. - Full weighted histogram ingestion support. - 2D ingestion from pairs of 1D piddles and (2, N) / (N, 2) coordinate matrices. - Export 1D histograms to PDL counts, bin edges, bin centers, and Poisson/weighted errors. - Export 2D histograms to PDL (nx, ny) matrices, X/Y bin edges, X/Y bin centers, and 2D error matrices. - High-level builders (hist1d, hist2d, pdl_to_histo, histo_to_pdl). - Direct OO method injection onto Math::Histo and Math::Histo::2D ($h->to_pdl, $h->fill_pdl, $h2d->to_pdl, $h2d->fill_pdl).