Computes the “unbiased” sample L-moments and L-moment ratios of multiple sets of data stored in a list or matrix. Following the paradigm of regional frequency analysis, we regard the data sets as coming from different measurement sites.
A list of numeric vectors, or a numeric matrix.
Number of L-moments to be computed.
Logical: whether each data set should be sorted.
Sample L-moments are computed for each data set.
The calculations use
x is a list, each list element should contain data for one site
and the names of the list elements should be the site names.
x is a matrix, each column should contain data for one site
and the column names should be the site names.
An object of class
It is a data frame with columns
containing respectively the site names and the
number of non-missing data values at each site,
and further columns containing the L-moments and L-moment ratios,
in the order l_1, t (or l_2),
t_3, t_4, etc.
The default parameter values are chosen to be convenient
for the regional frequency analysis methods described by
Hosking and Wallis (1997).
Note that the number of L-moments and the choice
of whether to return L-CV or L-scale
are different from the defaults for
J. R. M. Hosking [email protected]
Hosking, J. R. M., and Wallis, J. R. (1997). Regional frequency analysis: an approach based on L-moments. Cambridge University Press.
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