Given a random sample of exceedances, the estimator
returns an estimator of the shape parameter or extreme
value index using a kernel of order 3, based on
m largest exceedances of xdat.
Usage
PickandsXU(xdat, m)
Arguments
xdat
vector of observations of length \(n\)
m
number of largest order statistics \(3 \leq m \leq n\). Choosing \(m = n\) amounts to using only the three largest observations in the sample.
Details
The calculations are based on the recursions provided in Lemma 4.3 of Oorschot et al.
References
Oorschot, J, J. Segers and C. Zhou (2023), Tail inference using extreme U-statistics, Electron. J. Statist. 17(1): 1113-1159. tools:::Rd_expr_doi("10.1214/23-EJS2129")