quawak {lmomco} | R Documentation |
Quantile Function of the Wakeby Distribution
Description
This function computes the quantiles of the Wakeby distribution given
parameters (,
,
,
, and
) computed by
parwak
. The quantile function is
where is the quantile for nonexceedance probability
,
is a location parameter,
and
are scale parameters, and
and
are shape parameters. The five returned parameters from
parwak
in order are ,
,
,
, and
.
Usage
quawak(f, wakpara, paracheck=TRUE)
Arguments
f |
Nonexceedance probability ( |
wakpara |
|
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. |
Value
Quantile value for nonexceedance probability .
Author(s)
W.H. Asquith
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, v. 52, pp. 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
cdfwak
, pdfwak
, lmomwak
, parwak
Examples
lmr <- lmoms(c(123,34,4,654,37,78))
quawak(0.5,parwak(lmr))