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findK

Find Reference Value


Description

Calculates the reference value k for a Poisson or binomial CUSUM designed to detect a shift from θ_0 to θ_1

Usage

findK(theta0, theta1, distr = c("poisson", "binomial"),
      roundK = FALSE, digits = 1, ...)

Arguments

theta0

in-control parameter

theta1

out-of-control parameter

distr

"poisson" or "binomial"

digits

the reference value k is rounded to digits decimal places

roundK

For discrete data and rational reference value there is only a limited set of possible values that the CUSUM can take (and therefore there is also only a limited set of ARLs). If roundK=TRUE, integer multiples of 0.5 are avoided when rounding the reference value k, i.e. the CUSUM can take more values.

...

further arguments for the distribution function, i.e. number of trials n for the binomial CDF.

Value

Returns reference value k.


surveillance

Temporal and Spatio-Temporal Modeling and Monitoring of Epidemic Phenomena

v1.19.1
GPL-2
Authors
Michael H<f6>hle [aut, ths] (<https://orcid.org/0000-0002-0423-6702>), Sebastian Meyer [aut, cre] (<https://orcid.org/0000-0002-1791-9449>), Michaela Paul [aut], Leonhard Held [ctb, ths], Howard Burkom [ctb], Thais Correa [ctb], Mathias Hofmann [ctb], Christian Lang [ctb], Juliane Manitz [ctb], Andrea Riebler [ctb], Daniel Saban<e9>s Bov<e9> [ctb], Ma<eb>lle Salmon [ctb], Dirk Schumacher [ctb], Stefan Steiner [ctb], Mikko Virtanen [ctb], Wei Wei [ctb], Valentin Wimmer [ctb], R Core Team [ctb] (A few code segments are modified versions of code from base R)
Initial release
2021-03-30

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