UKFE: GenLogPars – R documentation

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GenLogPars

Generalised logistic distribution parameter estimates

Description

Estimated parameters from a sample (with Lmoments or maximum likelihood estimation) or from L1 (first L-moment), Lcv (linear coefficient of variation), and LSkew (linear skewness)

Usage

GenLogPars(x = NULL, mle = FALSE, L1, LCV, LSKEW)

Arguments

`x`	numeric vector. The sample
`mle`	logical argument with a default of FALSE. If FALSE the parameters are estimated with Lmoments, if TRUE the parameters are estimated by maximum likelihood estimation.
`L1`	first Lmoment
`LCV`	linear coefficient of variation
`LSKEW`	linear skewness

Details

The L-moment estimated parameters are by the method detailed in 'Hosking J. Wallis J. 1997 Regional Frequency Analysis: An Approach Based on L-moments. Cambridge University Press, New York'

Value

Parameter estimates (location, scale, shape)

Author(s)

Anthony Hammond

Examples

#Get an annual maximum sample and estimate the parameters using Lmoments
AM.27090 <- GetAM(27090)
GenLogPars(AM.27090$Flow)
#Estimate parameters using MLE
GenLogPars(AM.27090$Flow, mle = TRUE)
#calculate Lmoments and estimate the parmeters with L1, Lcv and Lskew
Lmoms(AM.27090$Flow)
GenLogPars(L1 = 302.2076, LCV = 0.1704826, LSKEW = 0.04211332)

UKFE

UK Flood Estimation

v0.1.6

GPL-3

Authors