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folliwing
2010 Feb 04
6
problems with SPC charts in R
...ing
following errors.
I have plotted the Xbar chart successfully using following command
obj <- qcc(a[,],type="Xbar")
But when I use the same command to plot the R chart and S chart jus by
replacing the type="Xbar" by type="R" and Type="R" ,I am getting folloiwing
error
Error in limits.R(center = NA_real_, std.dev = NA_real_, sizes = c(1000L, :
group size must be less than 51 when giving nsigmas
In addition: Warning message:
In sum(sizes * statistics) : Integer overflow - use sum(as.numeric(.))
obj<-qcc(D[trial],sizes=size[trial],type="p")...