[R] problems with SPC charts in R

[Peter Ehlers]

I suspect that you may have set qcc.options("cex") to
too large a value. Try lowering it with

qcc.options(cex=whatever)

  -Peter Ehlers

vikrant wrote:
> ok. I will give the example for which i m getting this error. The data for
> plotting R chart and S chart is very huge. SO i will take example for
> plotting C chart.
> Data is a follows :- 
> sample	D	size	trial
> 1	11	1000	TRUE
> 2	11	1000	TRUE
> 3	13	1000	TRUE
> 4	11	1000	TRUE
> 5	14	1000	TRUE
> 6	12	1000	TRUE
> 7	17	1000	TRUE
> 8	7	1000	TRUE
> 9	7	1000	TRUE
> 10	6	1000	TRUE
> 11	9	1000	TRUE
> 12	3	1000	TRUE
> 13	2	1000	TRUE
> 14	4	1000	TRUE
> 15	13	1000	TRUE
> 16	11	1000	TRUE
> 17	7	1000	TRUE
> 18	11	1000	TRUE
> 19	8	1000	TRUE
> 20	5	1000	TRUE
> 21	37	1000	TRUE
> 22	11	1000	TRUE
> 23	9	1000	TRUE
> 24	4	1000	TRUE
> 25	7	1000	TRUE
> 26	4	1000	TRUE
> 27	17	1000	TRUE
> 28	11	1000	TRUE
> 29	18	1000	TRUE
> 30	21	1000	TRUE
> 31	18	1000	TRUE
> 32	19	1000	TRUE
> 33	12	1000	TRUE
> 34	11	1000	TRUE
> 35	13	1000	TRUE
> 
> Here my sample size is 1000 for each sample no.
> 1st column corresponds  to  sample no.
> 2nd column corresponds  to no. of defects 
> 3rd column  corresponds  to sample size
> 4th column  , I have kept asTRUE because I want to consider whole data for
> calculating the control limits.
> The code which i use is as follows :- 
> 
> library(qcc)
> y<-read.table("Defect_data_2008.csv",sep=",",header=TRUE) 
> attach(y) 
> obj<-qcc(D[trial],sizes=size[trial],type="c") 
> But while plotting C chart I am getitng following error 
> Error in plot.new() : figure margins too large 
> 
> 
> For plotting the pchart if I just change the type="p" then it is plotting
> correctly without error.
> 
> 

-- 
Peter Ehlers
University of Calgary