lmom2par {lmomco} | R Documentation |
This function converts the L-moments of the data to the parameters of a
distribution. The type of distribution is specified in the
argument list: exp
, gam
, gev
, gld
, glo
, gno
,
gpa
, gum
, kap
, nor
, pe3
, ray
, revgum
, wak
, or wei
. There
is no Cauchy distribution support by the lmom2par
function because Cauchy uses TL-moments and not the ordinary L-moments. For Cauchy functions such as parcau
and lmomcau
should be used in accordance with their documentation.
lmom2par(lmom, type, ...)
lmom |
An L-moment object such as that returned by lmom.ub or pwm2lmom . |
type |
Three character distribution type (for example, type='gev' ). |
... |
Additional arguments for the parCCC functions. |
An R list
is returned. This list should contain at least the following items, but some distributions such as the revgum
have extra.
type |
The type of distribution in three character format. |
para |
The parameters of the distribution. |
source |
Attribute specifying source of the parameters. |
W.H. Asquith
Hosking, J.R.M., 1990, L-moments–Analysis and estimation of distributions using linear combinations of order statistics: Journal of the Royal Statistical Society, Series B, vol. 52, p. 105-124.
Hosking, J.R.M., 1996, FORTRAN routines for use with the method of L-moments: Version 3, IBM Research Report RC20525, T.J. Watson Research Center, Yorktown Heights, New York.
Hosking, J.R.M. and Wallis, J.R., 1997, Regional frequency analysis–An approach based on L-moments: Cambridge University Press.
lmr <- lmom.ub(rnorm(20)) para <- lmom2par(lmr,type='nor') frompara <- par2lmom(para) lmom.diff(frompara,lmr)