I suggest adding topics such as `r-package`, `time-series-analysis`, `nonlinear-time-series` in the About section, as explained at https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/classifying-your-repository-with-topics
I suggest adding topics such as
r-package,time-series-analysis,nonlinear-time-seriesin the About section, as explained at https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/classifying-your-repository-with-topics