Changes in version 1.2 (2025-12-02) Fix the bug in the initialization of BART. Changes in version 1.1 (2025-12-01) This release introduces the PSPI package, which implements Propensity Score Predictive Inference methods for generalizing trial findings to a target population. Key Functionalities: - PSPI_generalizability: Use Propensity Score Predictive Inference (PSPI) for generalizability analysis. - sim_data: Simulate data for trial data and population data. License: This package is licensed under the GNU General Public License version 2 (GPL-2). The core computations leverage code derived from the BART3 package, originally developed by Rodney Sparapani, which is also under GPL-2. Known Issues: - No significant issues at the moment. For more details on potential limitations, please refer to the documentation.