On Feb 15, 2010, at 3:47 AM, Prof Brian Ripley wrote:
On Sat, 13 Feb 2010, David Winsemius wrote:
On Feb 13, 2010, at 5:04 PM, David Winsemius wrote:
On Feb 13, 2010, at 4:08 PM, Hannes Nietnagel wrote:
Thanks David for your reply!
species.n <- as.numeric(iris$Species)
png("test.png")
plot(iris, col = species.n)
dev.off()
That works fine for the png. But I still get the message:
postscript
3
What does it mean? Is there something wrong with my postscript?
I think it is telling you which graohics device is open for
plotting.
I still cannot produce a decent .eps file.
From a fresh R session:
?quartz
starting httpd help server ... done
?postscript
species.n <- as.numeric(iris$Species)
png("test.png")
plot(iris, col = species.n)
dev.off()
null device
1
postscript("test.eps")
plot(iris, col = species.n)
dev.off()
null device
1
I now have two files in my working directory (albeit with
different aspect ratios). The test.eps file can be read by Preview
although it needs to be converted to pdf to be displayed, and
then appears perfectly normal to me. The help page for
postscript() says that single plots are eps by default, so I just
named it to correspond to htat promise. If you post the console
message and describe more fully what you mean by "cannot produce a
decent .eps file", someone might be able to comment more fully.
One the other hand, efforts to insert that file into an
OpenOffice.org presentation file results in an error: "Unknown
graohic format". However, adding 2 out of 3 of the recommended
arguments does result in a file that can be inserted. I'm not sure
what is wrong either with the three argument effort (see below) or
just using the "file=" argument approach.
postscript(file="test.eps",horizontal = FALSE, onefile = FALSE)
plot(iris, col = species.n)
dev.off()
null device
1
When I try with all three arguments I get an error:
postscript(file="test.eps",horizontal = FALSE, onefile = FALSE,
paper = "special")
plot(iris, col = species.n)
Error in plot.new() : figure margins too large
You did not specify the size of the 'special' paper: use width=,
height=.
If you just use file= you
1) may get a rotated plot (and will if the factory-fresh default for
horizontal= is in place).
2) get a header that does not declare this is EPS, and some
including applications will fail to include it (properly or at all).
3) get a plot with margins on the default paper size (A4 or US
letter), which is not what one wants for inclusion.
Thank you. Adding the height and width arguments to the last device
call succeeds in creating a file which OO.org's Impress program is
able to insert.
It is no longer readable by Preview.app, however. I am surmising that
Preview is only able to read postscript files that are "complete" in
some sense.
--
David.
--
Brian D. Ripley, rip...@stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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