UextI {IQCC} | R Documentation |
This function builds an improved version of the Shewhart u chart where the traditional normal-based control limits are corrected for the non-normality of the u-statistic for phase I.
UextI(x, sizes, par, length)
x |
The data (counts) to be plotted. |
sizes |
A value or a vector of values specifying the sample sizes associated with each group. |
par |
The sample ratios used to estimate the Poisson parameter(lambda). |
length |
The length of the data. |
Return the improved U chart.
Daniela R. Recchia, Emanuel P. Barbosa
data(moonroof) attach(moonroof) UextI(x=yi[1:17],sizes=ni[1:17],par=ui[1:17],17)