| xCC {CC} | R Documentation |
This function computes control limits for the x-charts, optionally revising them in the case that individual values plot outside the trial control limits.
xCC(x, sigma, k = 3, mu, newdata)
x |
a numeric vector consisting of the subgroup averages |
k |
the control chart parameter governing the width of the control limits |
sigma |
an estimate of the in-control standard deviation |
mu |
(optional) an estimate of the in-control mean |
newdata |
(optional) new observations |
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