Multiple groupedData plots in a postscript file using a loop
Karl Knoblick wrote:
Hallo!
I want to plot multiple grouped data in a postscript
file using a loop. As I use a loop no plot (or just
one empty plot) is generated. Here an example:
library(nlme)
data(Loblolly) # example data from nlme
postscript("PSFile.ps")
for (i in 1:1) # just as example
{
plot(Loblolly)
}
dev.off()
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
Result: Just an empty PSFile.ps. (Withoput the loop it works. May anybody help? Karl
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