freq.cusum {ssEDA}R Documentation

Frequency Cusum Plot

Description

Draws a cusum of event frequencies over time. The target value is the estimated mean frequency in the training period.

Usage

freq.cusum(events, delta=1, trainyears=7)

Arguments

events defines the events to be plotted. It is an object of class "subset", generally created by subsetcircle, subsetpolygon, subsetrect or subsetsphere.
delta number of months in each counted interval. Default is 1.
trainyears number of years in the training period.

See Also

depth.hist, freq.magnitude, magnitude.cusum, magnitude.time, epicentres, threeD, timeplot, multigraph

Examples

#    This example requires the NZ catalogue

require(ssNZ)

b <- subsetrect(NZ, minday=julian(1,1,1964), maxday=julian(1,1,1994),
                 mindepth=40, maxdepth=120, minmag=4)

freq.cusum(b)
[Package ssEDA version 2.2-1 Index]