On Oct 11, 2008, at 1:04 PM, Prof Brian Ripley wrote:
I don't see anywhere you asked for colour, and postscript() is
regarded as a 'print device' so the default is monochrome.
See ?trellis.device and the discussion of themes there: AFAICS you
want to set a colour theme.
I was at what seemed like a dead end after reading the help pages and
chapter 7 of Sarkar's lattice text that had examples of color output
but I saw no example code that produced such. Proceeding as I imagined
the help pages to be directing me ....
> lattice.options(default.theme = "col.whitebg")
> postscript("figs%03d.eps", width = 6.0, height = 6.0,
+ horizontal = FALSE, onefile = FALSE, paper = "special",
colormodel = "rgb")
# tried adding color = TRUE in the postscript call but it threw an
error so I then added it to the plot function.
> xyplot(Sepal.Length + Sepal.Width ~ Petal.Length + Petal.Width |
Species,
+ data = iris, scales = "free", layout = c(2, 2),
+ auto.key = list(x = .6, y = .7, corner = c(0, 0), color=TRUE))
> dev.off()
postscript
2
### black and white output in the file
Then I tried:
> trellis.device(device="postscript", color = TRUE)
> postscript("figs%03d.eps", width = 6.0, height = 6.0,
+ horizontal = FALSE, onefile = FALSE, paper = "special",
colormodel = "rgb")
> xyplot(Sepal.Length + Sepal.Width ~ Petal.Length + Petal.Width |
Species,
+ data = iris, scales = "free", layout = c(2, 2),
+ auto.key = list(x = .6, y = .7, corner = c(0, 0),
color=TRUE)) # color= probably not needed since it did not have
desired effect
> dev.off()
postscript
2
With the desired results. I had thought that the plot function would
be passing the color= parameter to the output device, but apparently
not.
On Sat, 11 Oct 2008, RICHARD PITMAN wrote:
I am using the following code to produce a graphic:
library(lattice)
postscript("figs%03d.eps", width = 6.0, height = 6.0,
horizontal = FALSE, onefile = FALSE, paper = "special")
xyplot(cases~yr|agrp*sex,data=data[tse==0 & expgrp==1,],
groups=source, pch=".", type="l",
main="Exposure group 1, time since entry 0")
The resulting figure is in black and white and I can not seem to
find a way to get colour output.
Any pointers gratefully received.
TIA
Richard
--
Brian D. Ripley, [EMAIL PROTECTED]
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
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