EFM                     The EFM function is to generate Elliptical
                        Factor Models data.
FanPC.EFM               Apply the FanPC method to the Elliptical Factor
                        Model
PC1.EFM                 Apply the PC method to the Elliptical Factor
                        Model
PPC1.EFM                Apply the PPC method to the Elliptical Factor
                        Model
SOPC.EFM                SOPC Estimation Function for Elliptical Factor
                        Model
elliptical_errors       Calculate errors for elliptical distributions
