pargev.xifix

Internal function that estimates GEV location and scale
parameters given a fixed shape parameter, using L-moment equations.

internal

Provides generalized L-moments estimation methods for the
generalized extreme value ('GEV') distribution. Implements both stationary
'GEV' and non-stationary 'GEV11' models where location and scale parameters
vary with time. Includes various penalty functions ('Martins'-'Stedinger',
Park, Cannon, 'Coles'-Dixon) for shape parameter regularization.
Also provides model averaging estimation ('ma.gev') that combines MLE and
L-moment methods with multiple weighting schemes for robust high quantile
estimation. The 'GLME' methodology is described in Shin et al. (2025a)
<doi:10.48550/arXiv.2512.20385>. The non-stationary L-moment method
is based on Shin et al. (2025b) <doi:10.1007/s42952-025-00325-3>.
The model averaging method is described in Shin et al. (2026)
<doi:10.1007/s00477-025-03167-x>.
See also 'Hosking' (1990) <doi:10.1111/j.2517-6161.1990.tb01775.x> for
L-moments theory and 'Martins' and 'Stedinger' (2000)
<doi:10.1029/1999WR900330> for penalized likelihood methods.

Yonggwan Shin

GLmom

Generalized L-Moments Estimation for Extreme Value Distributions

Seokkap Ko

Jihong Park

Yire Shin

Jeong-Soo Park

pargev.xifix function

<dl><dt>lmom</dt>
<dd>L-moments object from <code>lmomco::lmoms()</code>.</dd>
<dt>xifix</dt>
<dd>Fixed shape parameter value. Default is 0.1.</dd>
<dt>checklmom</dt>
<dd>Logical. Whether to check L-moment validity. Default is TRUE.</dd>
<dt>...</dt>
<dd>Additional arguments (unused).</dd></dl>

Arguments

GEV parameter estimation with fixed shape parameter (MAGEV internal) — pargev.xifix

<dl>

<dt>lmom</dt>
<dd>L-moments object from <code>lmomco::lmoms()</code>.</dd>


<dt>xifix</dt>
<dd>Fixed shape parameter value. Default is 0.1.</dd>


<dt>checklmom</dt>
<dd>Logical. Whether to check L-moment validity. Default is TRUE.</dd>


<dt>...</dt>
<dd>Additional arguments (unused).</dd>

</dl>

pargev.xifix: GEV parameter estimation with fixed shape parameter (MAGEV internal)

Description

Usage

Value

Arguments