File list (Check if you may need any files):
NL_Detection\auxiliary\CorrectTimeVariationFRF.m
............\.........\DetrendPeriodic.m
............\.........\HarmonicContent.m
............\.........\PlotFRF.m
............\.........\WH_NL.m
............\examples\NL_fast.asv
............\........\NL_fast.m
............\........\NL_robust.asv
............\........\NL_robust.m
............\Fast_NL_Anal.m
............\Plot_Fast_NL_Anal.m
............\Plot_Robust_NL_Anal.m
............\ReadMeFirst.m
............\Robust_NL_Anal.m
............\auxiliary
............\examples
NL_Detection