| lmomRFA-package {lmomRFA} | R Documentation |
The lmomRFA package
Description
R functions for regional frequency analysis using L-moments.
Details
This package implements methods described in the book
“Regional frequency analysis: an approach based on L-moments”
by J. R. M. Hosking and J. R. Wallis.
It is a supplement to the lmom package,
which implements L-moment methods for more
general statistical applications.
The following functions are contained in this package.
cluagg
performs agglomerative hierarchical clustering.
cluinf
provides information about cluster membership in a
hierarchical clustering.
clukm
performs cluster analysis via the K-means algorithm.
as.regdata
creates an object of class "regdata", which contains a
“regional data set” consisting of summary statistics
for different data samples, one of the main building blocks
of regional frequency analysis.
regsamlmu
computes the sample L-moments of multiple data sets.
regavlmom and reglmr
both compute, with slightly different interfaces, a regional
weighted average of sample L-moments from multiple sites.
Function regavlmom is recommended for general use;
reglmr is deprecated.
regtst
computes discordancy, heterogeneity and goodness-of-fit measures
for regional frequency analysis. These statistics are as described
in Hosking and Wallis (1997, chaps. 3-5).
regfit
fits a frequency distribution to a regional data set, giving a
“regional frequency distribution”.
regqfunc and siteqfunc
return the regional growth curve and the quantile functions for individual
sites, respectively, from a regional frequency distribution fitted by
regfit.
regquant and sitequant
directly compute quantiles of the regional growth curve and of
distributions for individual sites, respectively,
from a regional frequency distribution fitted by regfit.
regsimh
runs Monte Carlo simulations to estimate the distribution of
heterogeneity and goodness-of-fit measures for an artificial region.
regsimq
runs Monte Carlo simulations to estimate the variability of
quantile estimates from a regional frequency distribution.
regquantbounds and sitequantbounds
compute error bounds for the regional growth curve and for quantiles
at individual sites, respectively, from a regional frequency distribution
fitted by regfit.
Functions cluagg, cluinf, clukm, reglmr,
and regtst are analogous to Fortran routines from the
LMOMENTS package, version 3.04, available from StatLib at
http://lib.stat.cmu.edu/general/lmoments.
In addition, functions regsimh and regsimq
provide similar functionality to PROGRAM XSIM
in the LMOMENTS Fortran package.
Author(s)
J. R. M. Hosking jrmhosking@gmail.com
References
Hosking, J. R. M., and Wallis, J. R. (1997).
Regional frequency analysis: an approach based on L-moments.
Cambridge University Press.