This function returns a vector of length nmom corresponding to the
sample L-moments. Note that for orders greater or equal than 3 it is the L-moments
ratio that is sample L-coefficient of variation, sample L-skewness, sample L-kurtosis, ...
Arguments
x
a vector of data
nmom
a numeric value giving the number of sample L-moments to
be computed
sort.data
a logical which specifies if the vector of data x
should be sorted or not.
References
Hosking, J. R. M. (1990) L-moment analysis and estimation of
order statistics. Journal of the Royal Statistical Society Series
B, 52: 105--124.