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()
Yep, sorry. You need to print() a lattice plot in this case:
trellis.device("postscript", file = "PSFile.ps")
for (i in 1:1)
{
print(plot(Loblolly))
}
dev.off()Uwe Ligges
Just an empty postscript file.
Karl.
--- Uwe Ligges <[EMAIL PROTECTED]> :>
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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