quagam

This function computes the quantiles of the Gamma distribution given
parameters (\(\alpha\) and \(\beta\)) computed by <code>pargam</code>. The quantile function has no explicit form. See the <code>qgamma</code> function of R and <code>cdfgam</code>. The parameters have the following interpretations: \(\alpha\) is a shape parameter and \(\beta\) is a scale parameter in the R syntax of the <code><a href="/link/qgamma()?package=lmomco&version=2.4.14" data-mini-rdoc="lmomco::qgamma()">qgamma()</a></code> function.
Alternatively, a three-parameter version is available following the parameterization of the Generalized Gamma distribution used in the gamlss.dist package and for lmomco is documented under <code>pdfgam</code>. The three parameter version is automatically triggered if the length of the <code>para</code> element is three and not two.

distribution

quantile function

Distribution: Gamma

Distribution: Generalized Gamma

Package: gamlss.dist

Extensive functions for Lmoments (LMs) and probability-weighted moments (PWMs),
distribution parameter estimation, LMs for distributions, LM ratio diagrams, multivariate
Lcomoments, and asymmetric (asy) trimmed LMs (TLMs). Maximum likelihood and
maximum product spacings estimation are available. Right-tail and left-tail LM censoring
by threshold or indicator variable are available. LMs of residual (resid) and reversed
(rev) residual life are implemented along with 13 quantile operators for reliability analyses.
Exact analytical bootstrap estimates of order statistics, LMs, and LM var-covars are available.
Harri-Coble Tau34-squared Normality Test is available. Distributions with L, TL, and added
(+) support for right-tail censoring (RC) encompass: Asy Exponential (Exp) Power [L],
Asy Triangular [L], Cauchy [TL], Eta-Mu [L], Exp. [L], Gamma [L], Generalized (Gen) Exp
Poisson [L], Gen Extreme Value [L], Gen Lambda [L, TL], Gen Logistic [L], Gen Normal [L],
Gen Pareto [L+RC, TL], Govindarajulu [L], Gumbel [L], Kappa [L], Kappa-Mu [L],
Kumaraswamy [L], Laplace [L], Linear Mean Residual Quantile Function [L], Normal [L],
3p log-Normal [L], Pearson Type III [L], Polynomial Density-Quantile 3 and 4 [L],
Rayleigh [L], Rev-Gumbel [L+RC], Rice [L], Singh Maddala [L], Slash [TL], 3p Student t [L],
Truncated Exponential [L], Wakeby [L], and Weibull [L].

William Asquith

lmomco

L-Moments, Censored L-Moments, Trimmed L-Moments, L-Comoments,
and Many Distributions

quagam function

<dl> <dt>f</dt>
<dd>Nonexceedance probability (\(0 \le F \le 1\)).</dd> <dt>para</dt>
<dd>The parameters from <code>pargam</code> or <code>vec2par</code>.</dd> <dt>paracheck</dt>
<dd>A logical controlling whether the parameters are checked for validity. Overriding of this check might be extremely important and needed for use of the quantile function in the context of TL-moments with nonzero trimming.</dd></dl>

Arguments

Author

This function computes the quantiles of the Gamma distribution given
parameters (\(\alpha\) and \(\beta\)) computed by <code>pargam</code>. The quantile function has no explicit form. See the <code>qgamma</code> function of R and <code>cdfgam</code>. The parameters have the following interpretations: \(\alpha\) is a shape parameter and \(\beta\) is a scale parameter in the R syntax of the <code><a href='https://rdrr.io/r/stats/GammaDist.html'>qgamma()</a></code> function.
Alternatively, a three-parameter version is available following the parameterization of the Generalized Gamma distribution used in the gamlss.dist package and for lmomco is documented under <code>pdfgam</code>. The three parameter version is automatically triggered if the length of the <code>para</code> element is three and not two.

Quantile Function of the Gamma Distribution — quagam

<dl>

 <dt>f</dt>
<dd>Nonexceedance probability (\(0 \le F \le 1\)).</dd>

 <dt>para</dt>
<dd>The parameters from <code>pargam</code> or <code>vec2par</code>.</dd>

 <dt>paracheck</dt>
<dd>A logical controlling whether the parameters are checked for validity. Overriding of this check might be extremely important and needed for use of the quantile function in the context of TL-moments with nonzero trimming.</dd>

</dl>

quagam: Quantile Function of the Gamma Distribution

Description

Usage

Value

Arguments

Author

References

See Also