NA • Rtractor

Rtractor is licensed under the GNU General Public License, version 2, or (at your option) any later version — i.e. GPL (>= 2), as declared in the package DESCRIPTION.

Full license text: GPL v2: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html GPL v3: https://www.gnu.org/licenses/gpl-3.0.html

This choice (rather than MIT, used elsewhere in the Circadia Lab ecosystem) is required because Rtractor wraps third-party reference implementations that are themselves GPL-licensed. See inst/COPYRIGHTS for attribution, original copyright notices, and citation requirements for each wrapped source.