Vector containing the regional average \(L\)-moments.
Arguments
xmom
Matrix or data frame each of whose rows contains the \(L\)-moments
and \(L\)-moment ratios for one site, in the order \(\ell_1\),
\(\ell_2\), \(t_3\), \(t_4\), etc.
weight
Vector containing the weights to be used for each site.
If omitted, equal weights will be used.