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lmomco (version 0.88)

cdfgum: Cumulative Distribution Function of the Gumbel Distribution

Description

This function computes the cumulative probability or nonexceedance probability of the Gumbel distribution given parameters ($\xi$ and $\alpha$) of the distribution computed by pargum. The cumulative distribution function of the distribution is

$$F(x) = e^{-e^{\left(-\frac{(x-\xi)}{\alpha}\right)}} \mbox{,}$$

where $F(x)$ is the nonexceedance probability for quantile $x$, $\xi$ is a location parameter, and $\alpha$ is a scale parameter.

Usage

cdfgum(x, para)

Arguments

x
A real value.
para
The parameters from pargum or similar.

Value

  • Nonexceedance probability ($F$) for $x$.

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, vol. 52, p. 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

quagum, pargum

Examples

Run this code
lmr <- lmom.ub(c(123,34,4,654,37,78))
  cdfgum(50,pargum(lmr))

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