Changes in version 4.3.2 (2026-02-12) - Allows for parallel flip with chains argument in redist_flip(). - Fixes URL issues causing a note on CRAN. We have pointed the links to our website directly. Changes in version 4.3.0 (2025-07-08) - Improves SMC performance by pre-allocating some memory while drawing spanning trees. - Replaces SMC label-counting adjustments (exact and importance-sampling-based) with a new backward kernel that eliminates approximation error and requires far less computation - 4.2.0 introduced some regressions in redist_shortburst() along with the new features. The following issues are fixed: - the returned redist_plans object would store the wrong score for the '' input. This issue only impacted the returned object and the correct score was used during the shortburst process. (#180) - the function would return immediately if stop_at was specified and minimize = FALSE. (#181) - Add summary() support for plans sampled with the flip algorithm. This does not replace the full flip diagnostic suite, but provides an easy way to compute r-hats. Changes in version 4.2.0 (2024-01-13) - Deprecate functionality that is provided by redistmetrics package. - Improve contiguity checking speed drastically. - Support for multiple independent scoring functions in redist_shortburst(). With multiple scorers, the algorithm will stochastically explore to try to find the largest Pareto frontier for the scores. The frontier can be accessed with attr(, "pareto_score"). - Removes the MPI vignette which relied on older implementations of redist.mcmc(), which was replaced by redist.flip() a few years ago, and finally redist_flip(). Changes in version 4.1.1 (2023-04-03) - Resolves a sanitizer error for CRAN Changes in version 4.1.0 (2023-03-19) - Improved diagnostic output - New redist_ci interface for confidence interval calculation - Improved plotting options with redist.plot.distr_qtys() for custom geometry types. - Improved resampling efficiency at the final SMC stage - Faster implementation of loop-erased random walk in C++ - Faster random number generation in C++ - Updated citation information Changes in version 4.0.0 - A new constraint interface that is more flexible, user friendly, and consistent across algorithms (see redist_constr() and ?constraints). For the first time, user-defined custom constraints are supported and integrated within all three algorithms. - New diagnostic-checking function, summary.redist_plans() - Summary statistics have been broken out into a new redistmetrics package This will speed up compilation time and also provides a cleaner, more extensible interface for the implementation of additional metrics. - Parallel computing support for the SMC algorithm, both within and across sampling runs - Reproducible across-run parallelism throughout the package, via doRNG - Much faster match_numbers() using the Hungarian method - min_move_parity() calculates how much population needs to be moved between districts in order to completely balance a redistricting plan. - Support for partial SMC simulations, where fewer districts are drawn than the total number. Allows advanced users to manually combine partial runs to form complete maps. - Improved algorithm reporting, including new progress bars and cli errors and warnings throughout the package - Update the SMC algorithm to include a missing correction factor for the number of ways to sequentially label districts. This factor should not have an effect on substantive conclusions and summary statistics. - Remove deprecated functions - Many bug fixes (see https://github.com/alarm-redist/redist/issues) Changes in version 3.1.6 - Utilities for using municipalities as well as counties in split calculations Changes in version 3.1.5 (2021-10-05) - skip SMC test on Linux Changes in version 3.1.4 (2021-09-19) - skip SMC test on Solaris Changes in version 3.1.2 - Fixes crash caused by redist.splits() Changes in version 3.1.1 (2021-09-05) - Fixes printing bug in color_graph() Changes in version 3.1.0 - Removes prior deprecated functions and arguments - Fix bugs (#78, #81, #86) - Introduces redist_mergesplit_parallel() - Adds rbind() generic for redist_plans objects - Improves sampling speed for SMC and Merge-split with county constraint - Adds county split measures. - Adds population overlap measures for plan comparisons. - Deprecates redist.smc() in favor of redist_smc() and redist.mergesplit() in favor of redist_mergesplit(). Changes in version 3.0.2 - Fix bugs (#60, #61, #62, #70, #71, #72), including s2 compatibility, Solaris fixes, and improved dplyr verb robustness. Changes in version 3.0.1 (2021-04-07) - New tidy interface, including new redist_map and redist_plans objects - Merge-split MCMC now available in redist_mergesplit() - Short burst MCMC optimization now available in redist_shortburst() along with scoring functions (?scorers) - Improved Flip MCMC interface and performance improvements - New support for larger simulation size limits - Functions to freeze parts of a map and extract district cores - New VRA constraint - Many new plotting functions - Consistent function and argument names - New partisanship and compactness metrics - Performance improvements to compactness calculations - Plan comparison and classification in compare_plans() and classify_plans() - New iowa dataset and cleaned-up package data - New vignettes for redistricting analysis and workflows - Various bug fixes Changes in version 2.0.4 - New redist.subset allows for easy subsetting of an adjacency graph - Added a NEWS.md file to track changes to the package