RCC {CC} | R Documentation |
This function computes control limits for R-charts, optionally revising them in the case that ranges plot out of the trial control limits.
RCC(R, n, k=3, sigma)
R |
a numeric vector consisting of the subgroup ranges |
n |
the subgroup size |
k |
the control chart parameter governing the width of the control limits |
sigma |
(optional) an estimate of the in-control standard deviation |
a list consisting of the upper and lower control limits and the centerline
W.J. Braun
Montgomery, D.C. (2000) Introduction to Statistical Quality Control, Wiley
plot.CC
x <- matrix(rnorm(120, sd = 3), ncol=12)
x.R <- xbarRCC(x)
plot(x.R)
x.R <- xbarRCC(x, newdata=rnorm(12))
plot(x.R)