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.
RNAmf_three_level       Fitting the model with three fidelity levels
RNAmf_two_level         Fitting the Recursive non-additive model with
                        two fidelity levels.
predict.RNAmf           prediction of the RNAmf emulator with 2 or 3
                        fidelity levels.
