lmomco (version 1.6.1)

are.parwak.valid: Are the Distribution Parameters Consistent with the Wakeby Distribution

Description

The distribution parameter object returned by functions of this package such as by parwak are consistent with the corresponding distribution, otherwise a list would not have been returned. However, other functions (cdfwak, quawak, and lmomwak require consistent parameters to return the cumulative probability (nonexceedance), quantile, and L-moments of the distribution, respectively. These functions internally use the are.parwak.valid function. The FORTRAN source code of Hosking provides the basis for the function.

Usage

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

Arguments

para

A distribution parameter list returned by parwak.

nowarn

A logical switch on warning surpression. 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 a

Value

• TRUE
  If the parameters are wak consistent.
• FALSE
  If the parameters are not wak 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.wak

Examples

para <- parwak(lmom.ub(c(123,34,4,654,37,78)))
if(are.parwak.valid(para)) Q <- quawak(0.5,para)