quasla: Quantile Function of the Slash Distribution
Description
This function computes the quantiles of the Slash distribution given
parameters (\(\xi\) and \(\alpha\)) provided by
parsla. The quantile function \(x(F; \xi, \alpha)\) for nonexceedance probability \(F\) and where \(\xi\) is a location parameter and \(\alpha\) is a scale parameter is complex and requires numerical optimization of the cumulative distribution function (cdfsla).
Usage
quasla(f, para, paracheck=TRUE)
Value
Quantile value for for nonexceedance probability \(F\).
Arguments
f
Nonexceedance probability (\(0 \le F \le 1\)).
para
The parameters from parsla or vec2par.
paracheck
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.
Author
W.H. Asquith
References
Rogers, W.H., and Tukey, J.W., 1972, Understanding some long-tailed symmetrical distributions: Statistica Neerlandica, v. 26, no. 3, pp. 211--226.