MATLAB code for deseasonalizing hourly PV/GHI data using a ridge-regularized ELM. It extracts a phase-based seasonal component, computes stationary residuals (PACFsum), and performs a grid search on lag length and hidden units. Includes plots and tools for tuning ELM parameters in solar forecasting.

MATLAB implementation of cyclostationary persistence forecasting operators (BLEND, CLIPER) for periodic energy time series. Training-free analytical framework preserving cyclic variance and covariance. Applied to solar irradiance, wind speed and electrical load forecasting. Companion code for peer-reviewed publication.