are.parwei.valid {lmomco} | R Documentation |
The distribution parameter object returned by functions of this package such as by parwei
are consistent with the corresponding distribution, otherwise a list would not have been returned. However, other functions (cdfwei
, quawei
, and lmomwei
require consistent parameters to return the cumulative probability (nonexceedance), quantile, and L-moments of the distribution, respectively. These functions internally use the are.parwei.valid
function. The FORTRAN source code of Hosking provides the basis for the function.
are.parwei.valid(para,nowarn=FALSE)
para |
A distribution parameter list returned by parwei . |
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 an optimization algorithm. |
TRUE |
If the parameters are wei consistent. |
FALSE |
If the parameters are not wei consistent. |
This function calls is.wei
to verify consistency between
the distribution parameter object and the intent of the user.
W.H. Asquith
Hosking, J.R.M. and Wallis, J.R., 1997, Regional frequency analysis—An approach based on L-moments: Cambridge University Press.
para <- parwei(lmom.ub(c(123,34,4,654,37,78))) if(are.parwei.valid(para)) Q <- quawei(0.5,para)