With much help from Chuck Cleland, I was able to get xyplot to
generate the plot I wanted. I'm trying to write a script (that can be
read using source("file")) to create the plots I want and save them to
files.
If I type the following lines into the R (in interactive mode), the
correct plot gets saved into the file myfile.ps with a size of 4,096
bytes:
----------------------------
require(lattice)
trellis.device("postscript", file="myfile.ps", color=FALSE,
paper="letter", horizontal=TRUE, onefile=TRUE)
xyplot(y ~ x, type="b", data.frame(x=1:5, y=5:1))
dev.off()
----------------------------
However, if I put the same lines into a file, "temp.txt", and type
source("temp.txt") into R, then myfile.ps ends up with a size of 2,332
bytes and shows a blank page when loaded into ghostscript.
When run using source, it looks like the device is not getting closed
correctly since if I type source("temp.txt") and then dev.list() R
responds: "postscript 2"
If I type dev.off(), the file size then increases to 4,277 bytes, but
then the ps file is malformed.
Anyone know how to make this work?
Jamie
This is in the FAQ: You need to wrap any trellis calls in functions or scripts in print(). Andy> From: Jamieson Cobleigh > > With much help from Chuck Cleland, I was able to get xyplot to > generate the plot I wanted. I'm trying to write a script (that can be > read using source("file")) to create the plots I want and save them to > files. > > If I type the following lines into the R (in interactive mode), the > correct plot gets saved into the file myfile.ps with a size of 4,096 > bytes: > > ---------------------------- > require(lattice) > > trellis.device("postscript", file="myfile.ps", color=FALSE, > paper="letter", horizontal=TRUE, onefile=TRUE) > > xyplot(y ~ x, type="b", data.frame(x=1:5, y=5:1)) > > dev.off() > ---------------------------- > > However, if I put the same lines into a file, "temp.txt", and type > source("temp.txt") into R, then myfile.ps ends up with a size of 2,332 > bytes and shows a blank page when loaded into ghostscript. > > When run using source, it looks like the device is not getting closed > correctly since if I type source("temp.txt") and then dev.list() R > responds: "postscript 2" > > If I type dev.off(), the file size then increases to 4,277 bytes, but > then the ps file is malformed. > > Anyone know how to make this work? > > Jamie > > ______________________________________________ > R-help at stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! > http://www.R-project.org/posting-guide.html > > >