Introducing 'miniRECgap' R package for simple gap-filling of missing eddy covariance CO2 flux measurements with classic nonlinear environmental response functions via GUI-supported R-scripts (case-study: In-sample gap-filling with 'miniRECgap' vs. MDS and an optimised shallow ANN in a 'challenging' peatland ecosystem). - Alina Premrov; Jagadeesh Yeluripati; Richard Slevin; Adam Bates 002; Magdalena Matysek; Stephen Barry; Kenneth A. Byrne; Rowan Fealy; Bernard Hyde; Gary Lanigan; Mark McCorry; Rachael Murphy; et al. (Environ. Model. Softw., 2025)