POT: exiplot – R documentation

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POT

exiplot

Extremal Index Plot

Description

Plot estimates of the Extremal Index

Usage

exiplot(data, u.range, tim.cond = 1, n.u = 50, xlab, ylab, ...)

Arguments

`data`	A matrix/data.frame with two columns. Columns names must be `obs` for observations and `time` for the associated date of each observation.
`u.range`	A numeric vector of length 2. Specify the range of threshold for which the Extremal Index is estimated.
`tim.cond`	A time condition to ensure independence between events. Should be in the same unit that `data[,"time"]`.
`n.u`	Numeric. The number of thresholds at which the Extremal Index is estimated.
`xlab, ylab`	Optional character strings to label the x and y axis.
`...`	Optional options to be passed to the `plot` function.

Value

Returns invisibly a matrix with two columns. The first one thresh giving the threshold and the second one exi the related Extremal Index estimate.

Author(s)

Mathieu Ribatet