Standardized Ranking Performance Index for Model Selection // Flexible implementation of the Standardized Ranking Performance Index (sRPI) for model selection based on multiple evaluation criteria. The package combines multiple statistical measures into a single index to provide an objective and robust ranking of models across calibration, validation, and combined scenarios. It supports evaluation of statistical, machine learning, and other predictive models using user-defined performance criteria. For more details see Aschonitis et al. (2019) doi:10.1016/j.envsoft.2019.01.005 and Singh et al. (2023) doi:10.1016/j.ecoinf.2022.101933.