[R] Multiple groupedData plots in a postscript file using a loop

[Karl Knoblick]

Thanks, but it does NOT work using a loop (your
example without loop works):

trellis.device("postscript", file = "PSFile.ps")
for (i in 1:1)
{
  plot(Loblolly)
}
dev.off()

Just an empty postscript file.

Karl.

 --- Uwe Ligges <ligges at statistik.uni-dortmund.de> :> 
> Note that this is a lattice plot:
> 
>   class(Loblolly)
> [1] "nfnGroupedData" "nfGroupedData"  "groupedData" 
>   "data.frame"
> 
> Thus, the method plot.nfnGroupedData() producing a
> lattice plot is 
> called by the generic plot().
> 
> So, you don't want to start postscript(), but
>   trellis.device("postscript", file = "PSFile.ps")
>   plot(Loblolly)
>   dev.off()
> 
> Uwe Ligges
> 


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