Changes in version 0.3.1 (2026-01-16) New features - Added more flexible writing support: notes, subcolumns, and additional table formatting options. Changes - Added David Micklem as contributor. Changes in version 0.3.0 (2020-07-04) New features - Added an option 'date_x' to specify whether to import date X columns as character string of dates or as years from the first time point. Changes in version 0.2.0 (2019-01-08) New features - Added support for writing pzfx files. See ?write_pzfx for details. Bug fixes - 'HugeTable' in '.pzfx' files is now respected. 'HugeTable' is used for tables with more than 104 data sets and/or 52 subcolumns by 'GraphPad Prism'. Changes in version 0.1.0 (2018-09-28) New features - Initial CRAN release. See the documentation at https://yue-jiang.github.io/pzfx/.