This may be a simple misunderstanding on my part, but I need help understanding what POT is plotting. I'm trying to analyze a few different datasets. If my dataset covers 500 years, but I have 60 points above my threshold, what should be plotted as the (empirical) return period for the largest value? I would expect it to be 500 years. Why is it never close to that? An example with real numbers, over 382 years, I have 52 points over my selected threshold. So why is the return period for this largest point coming out at 1200 years? Again, this is for the actual data. The model can be whatever it, I don't care, but the data should at least be easy to understand. I'm using the POT package, and tasks fitgpd, plot, retlev (latter two with npy=52/382). Thanks in advance for any help. -- View this message in context: http://r.789695.n4.nabble.com/POT-package-return-levels-tp3860650p3860650.html Sent from the R help mailing list archive at Nabble.com.