| BestExp | Fitting of Best Exponential Autoregressive Moving Average (EXPARMA) Model | 
| EXPARMAfit | Fitting of Exponential Autoregressive Moving Average (EXPARMA) Model | 
| EXPARMA_optim | Fitting of Exponential Autoregressive Moving Average (EXPARMA) Model | 
| init_val | Fitting of Exponential Autoregressive Moving Average (EXPARMA) Model |