The pwpfit toolbox is published open-source in the hope that it will be useful in academics and otherwise. The source code may be used, modified, and distributed in the understanding that license and copyright information are preserved; the latter does not apply if distributed unaltered as library. (GNU LGPL-2.1) Full license information can be found in the repository. The toolbox has been created, developed, and maintained 2017--today by Torbjørn Cunis.

Torbjørn Cunis. The pwpfit toolbox for polynomial and piece-wise data fitting. In 18th IFAC Symposium on System Identification (SYSID 2018). Stockholm, Sweden, 2018. doi:j.ifacol.2018.09.204