lmomco (version 1.7.3)

lmom2par: Convert L-moments to the the Parameters of a Distribution

Description

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: aep4, exp, gam, gev, gld, glo, gno, gpa, gum, kap, kur, ln3, 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.

Usage

lmom2par(lmom, type, ...)

Arguments

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.

Value

• 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.

References

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.

See Also

lmom2par

Examples

lmr      <- lmom.ub(rnorm(20))
para     <- lmom2par(lmr,type='nor')