importFrom(MASS,mvrnorm)
importFrom(SOPC,PPC)
importFrom(SOPC,SOPC)
importFrom(matrixcalc,frobenius.norm)
importFrom(stats,cor)
importFrom(stats,cov)
importFrom(stats,prcomp)
importFrom(stats,rnorm)
importFrom(stats,runif)
importFrom(stats,rt)
export(PC1.EFM)
export(PPC1.EFM)
export(SOPC.EFM)
export(FanPC.EFM)
export(EFM)
export(elliptical_errors)