lmomco (version 2.3.1)

are.pargev.valid: Are the Distribution Parameters Consistent with the Generalized Extreme Value Distribution

Description

Is the distribution parameter object consistent with the corresponding distribution? The distribution functions (cdfgev, pdfgev, quagev, and lmomgev) require consistent parameters to return the cumulative probability (nonexceedance), density, quantile, and L-moments of the distribution, respectively. These functions internally use the are.pargev.valid function.

Usage

are.pargev.valid(para, nowarn=FALSE)

Arguments

para

A distribution parameter list returned by pargev or vec2par.

nowarn

A logical switch on warning suppression. If TRUE then options(warn=-1) is made and restored on return. This switch is to permit calls in which warnings are not desired as the user knows how to handle the returned value---say in an optimization algorithm.

Value

TRUE

If the parameters are gev consistent.

FALSE

If the parameters are not gev consistent.

References

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

is.gev, pargev

Examples

# NOT RUN {
para <- pargev(lmoms(c(123,34,4,654,37,78)))
if(are.pargev.valid(para)) Q <- quagev(0.5,para)
# }