A statistical graphic designed for the archaeological study of when events of a specified kind occurred.

## Arguments

- object
An

`EventsMCMC`

object.- ...
Currently not used.

- interval
A

`character`

string specifying the confidence interval to be drawn. It must be one of "`ci`

" (credible interval; the default) or "`hpdi`

" (highest posterior density interval). Any unambiguous substring can be given.- level
A length-one

`numeric`

vector giving the confidence level.- colour
A

`character`

string specifying the colour of the segments.- x
An

`OccurrenceEvents`

object.

## Value

`occurrence()`

returns an`OccurrenceEvents`

object.`autoplot()`

and`multiplot`

return a`ggplot`

object.`plot()`

is called it for its side-effects: it results in a graphic being displayed (invisibly returns`x`

).

An `OccurrenceEvents`

object.

## Details

If we have \(k\) events, then we can estimate the calendar date \(t\) corresponding to the smallest date such that the number of events observed before \(t\) is equal to \(k\).

The `occurrence()`

estimates these occurrences and gives the credible
interval or the highest posterior density (HPD) region for a given `level`

of confidence.