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N-year return levels, median and mean estimate

Usage

gev.Nyr(par, nobs, N, type = c("retlev", "median", "mean"), p = 1/N)

Arguments

par

vector of location, scale and shape parameters for the GEV distribution

nobs

integer number of observation on which the fit is based

N

integer number of observations for return level. See Details

type

string indicating the statistic to be calculated (can be abbreviated).

p

probability indicating the return level, corresponding to the quantile at 1-1/p

Value

a list with components

  • est point estimate

  • var variance estimate based on delta-method

  • type statistic

Details

If there are \(n_y\) observations per year, the L-year return level is obtained by taking N equal to \(n_yL\).