evir (version 1.7-4)

shape: Plot for GPD Shape Parameter

Description

Creates a plot showing how the estimate of shape varies with threshold or number of extremes.

Usage

shape(data, models = 30, start = 15, end = 500, reverse = TRUE,
    ci = 0.95, auto.scale = TRUE, labels = TRUE, …)

Arguments

data

numeric vector of data

models

number of consecutive gpd models to be fitted

start

lowest number of exceedances to be considered

end

maximum number of exceedances to be considered

reverse

should plot be by increasing threshold (TRUE) or number of extremes (FALSE)

ci

probability for asymptotic confidence band; for no confidence band set to zero

auto.scale

whether or not plot should be automatically scaled; if not, xlim and ylim graphical parameters may be entered

labels

whether or not axes should be labelled

…

other graphics parameters

Value

A table of results is returned invisibly.

Details

For every model gpd is called. Evaluation may be slow.

See Also

gpd, plot.gpd, hill

Examples

# NOT RUN {
data(danish)
# }
# NOT RUN {
shape(danish)
# }
# NOT RUN {
# Shape plot of heavy-tailed Danish fire insurance data 
# }