det_alpha: calculation of alpha (failure probability), when having the...
In highriskzone: Determining and Evaluating High-Risk Zones

det_alpha

R Documentation

calculation of alpha (failure probability), when having the threshold c

Description

This function is used for the intensity-based method. It determines the probability to have at least one unobserved event outside the high-risk zone. A Poisson distribution is used for the number of unobserved events in a certain area or field. Used in functions det_threshold, det_thresholdfromarea.

Usage

det_alpha(intens, threshold, nxprob = 0.1)

Arguments

`intens`	estimated intensity of the observed process (object of class "im", see `density.ppp`)
`threshold`	threshold c: The high-risk zone is the field in which the estimated intensity exceeds this value.
`nxprob`	probability of having unobserved events