| ALC_RNAmf | find the next point by ALC criterion |
| ALMC_RNAmf | find the next point by ALMC criterion |
| ALM_RNAmf | find the next point by ALM criterion |
| NestedX | Constructing the nested design sets for RNA model. |
| predict.RNAmf | prediction of the RNAmf emulator with 2 or 3 fidelity levels. |
| RNAmf_three_level | Fitting the model with three fidelity levels |
| RNAmf_two_level | Fitting the Recursive non-additive model with two fidelity levels. |