I'm having a problem creating png images with trellis.device. I would like to create many plots with a white background using a sequence number in the file argument (i.e. "%02d"). The first plot is as expected with a white background. However, the second and all subsequent plots have a gray background. I would like all plots to have a white (or transparent) background. Below is an example:
library(lattice) z <- expand.grid(A = LETTERS[1:8], B = letters[1:6]) z$x <- z$y <- rep(1, nrow(z)) trellis.device(png, file = "test%02d.png", bg = "white") lset(col.whitebg()) xyplot(y ~ x | A * B, data = z, layout = c(4, 6)) dev.off()
This is also the case for jpeg and bmp though win.metafile and postscript do not have this problem. Is this a bug or am I missing something obvious?
I found one reference that implies this may be expected behaviour but I'm not sure if I interpretted the comment correctly.
http://finzi.psych.upenn.edu/R/Rhelp02a/archive/18890.html
> R.version
_
platform i386-pc-mingw32
arch i386
os mingw32
system i386, mingw32
status
major 1
minor 9.1
year 2004
month 06
day 21
language R
> help(package = lattice)Information on Package 'lattice'
Description:
Package: lattice Version: 0.9-12 Date: 2004/06/01 <snip>
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