|See also:||spccusumCc spccusumCarl spccusumCad spccusumCpmf spccusum1 spccusum2|
|Description:||graphical representation of a Crosier CUSUM chart for given data, critical value and reference value k.|
|Usage:||spccusumC(k, c, observed)|
|k||scalar, reference value. It must be positive and be expressed as a multiple of the standard error.|
|c||scalar, critical value|
|observed||n x 1 vector containing the user-defined data|
; Crosier CUSUM chart for 100 pseudorandom variables ; with normal distribution, where the first 80 observations ; have mean = 0 and the next 20 have mean = 1. The chart ; parameters are k = 0.5 and in-control ARL = 300: library("spc") mean = #(matrix(80) .* 0, matrix(20) .* 1) randomize(31) observed = normal(100) + mean c = spccusumCc(300,.5,50) spccusumC( .5, c, observed)
A display showing the Crosier's two-sided CUSUM chart. Alarm is signaled at t=88.