findK {surveillance} | R Documentation |
Calculates the reference value k
for a Poisson or binomial CUSUM
designed to detect a shift from theta_0 to theta_1
findK(theta0, theta1, distr = c("poisson", "binomial"), roundK = FALSE, digits = 1, ...)
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. |
Returns reference value k
.