NEWS file for the lamW package

Version 2.2.5 (2025-07-08)

Fixed

• Corrected and updated ‘README’ and ‘CITATION’.

Changed

• Use ‘Rmath’ instead of ‘cmath’.

• Update internal tests.

Version 2.2.4 (2024-06-16)

Added

• Installed new version of rhub testing.

Changed

• Updated DOI to native CRAN.

• Minor changes to C code for consistency.

• Updated package metadata unit tests.

Version 2.2.3 (2023-11-28)

Fixed

• Package built with development version of Rcpp to remove CRAN's “string literal” errors.

Changed

• Corrected some headers in ‘NEWS.Rd’

Version 2.2.2 (2023-11-20)

Fixed

• NEWS was not rendering on CRAN because the file name used lowercase, ‘News.Rd’, and not ‘NEWS.Rd’.

Changed

• Tweaked documentation.

Version 2.2.1 (2023-10-04)

Changed

• Removed line from ‘NEWS.Rd’ which may have been preventing proper rendering on CRAN.

• added $(LTO_OPT) to ‘Makevars’ and ‘Makevars.win’ and UseLTO to ‘DESCRIPTION’.

• Cleaned up ‘README.md’ and moved citation, contributions, and security information to their own files.

Version 2.2.0 (2023-08-07)

Fixed

• Corrected initial guess for Fritsch step for 6.4\times 10^{-3} \lt x \le e. Does not change results but may converge in one fewer step.

Changed

• Replaced Fritsch's Padé approximation with a degree-six polynomial minimax approximation for x \in \left[-6.4\times 10^{-3}, 6.4\times 10^{-3} \right] with true values based on the non-underflowing Halley step. Should be faster than Halley iteration and more accurate than the Fritsch's Padé approximation.

• Various grammar, linting, and unit test updates.

Added

• Added methods to Suggests as per PR1 (Thanks Michael Chirico).

Version 2.1.2 (2023-02-28)

Changed

• Adjusted TBB grain size to prevent parallelism for fewer than 4 elements.

• Streamlined C++ code to follow more logical if-else cascade.

• Removed unneeded setup from C++ and R calls.

• Cleaned up documentation.

• CITATION updated to use bibentry per CRAN request.

• Updated internal code to be more compliant with personal style guide.

• Updated Github actions.

Version 2.1.1 (2022-01-18)

Changed

• Converted test suite to tinytest framework to reduce dependencies.

• Added DOI and CFF for citation purposes.

Version 2.1.0 (2021-05-20)

Changed

• Obtained access to original Fritsch paper and used supplied Padé expansion (equation 5) for values close to 0, eliminating the need for the Halley step close to 0 and speeding up code slightly.

Version 2.0.0 (2021-01-05)

Changed

• Used series expansion around 0 for more accurate return value for x \le 10^{-16} (thanks to Jerry Lewis).

• Contracted region around -\frac{1}{e} which returns -1 to Machine$double.eps.

• Converted continuous integration to Github actions.

Version 1.3.3 (2020-06-26)

Fixed

• Corrected minor issues tripping CRAN checks.

• Adjusted linking to other packages in help documentation.

Changed

• Moved repository to Github.

Added

• Added Travis, Appveyor, and Codecovr.

• Added check for package version and behavior at -\frac{1}{e}.

• explicit calls to std:: in the C++ code.

Version 1.3.2 (2020-05-25)

Fixed

• Corrected regression which treated \infty and -\infty as the same on the principle branch (thanks to CRAN & Uwe Ligges).

Added

• Added test to ensure \infty and -\infty are identified accurately.

• Expanded existing tests.

Version 1.3.1 (2020-05-24) [YANKED]

Added

• Use R magic words and Rcpp sugar instead of calls to STD (caused regression).

• Added more tests near asymptotes and for real vs. integer.

• Added ORCID to DESCRIPTION.

Changed

• Reduced max interations in some loops as convergence acheived more quickly.

• Refactored old nomenclature.

• Cleaned code for whitespace and unnecessary comments.

• Spellcheck and minor cleanup of help file.

Version 1.3.0 (2017-04-24)

Added

• Added new package native routine registration.

Version 1.2.0 (2016-10-26)

Changed

• Now using RcppParallel for calculation. Speedup when calculating more than one value at a time should be noticeable, e.g. around a 5X speedup on an 8 core machine. There should be no noticeable change when calculating single values at a time.

Version 1.1.1 (2016-05-02)

Added

• Added testing for proper behavior near 0 due to log in Fritsch step implementation.

Fixed

• Edited NEWS.Rd so that it shows properly on CRAN.

Version 1.1.0 (2016-03-15)

Changed

• Switched from exclusively using Halley iteration to usually using Fritsch iteration resulting in a significant increase in speed in both branches.

Version 1.0.0 (2015-12-27)

Added

• Added explicit exportation of headers for use in the LambertW package (thanks to Georg M. Goerg).

Changed

• Update to initial release.

• Adjust NEWS to more closely follow keep a changelog suggestions.

• Removed mention of LambertW and its importing the gsl package from the documentation as it now imports this package instead.

Version 0.1.2 (2015-10-07)

Added

• Have both branches of the function return their respective limits. The main branch returns Inf when it is passed Inf and the secondary branch returns -Inf when it is passed 0 (thanks to Georg M. Gorg).

Changed

• Make unit tests more robust.

• Update code for tests for equality for changes in testthat package.

Version 0.1.1 (2015-05-20)

Fixed

• Remove extra parenthesis which was causing boolean to be passed to fabs (thanks to Professor Brian Ripley).

Added

• Added URL and Bugreports to DESCRIPTION.

• Implemented minor optimizations to reduce number of needed calculations.

• Added comments to source explaining Halley step and provenance of numeric coefficients in Padé approximant.

• Added more robust unit testing.

Changed

• Enhanced and cleaned documentation.

• Cleaned up source code from unnecessary comments.

Version 0.0.1 (2015-05-19)

Added

• Initial release.