On Nov 26, 2010, at 6:35 PM, Marius Hofert wrote:
Dear expeRts,
I am not sure if I found a bug...
I would like to create a function that itself creates a lattice plot
without
colors. Following http://www.mail-archive.com/r-help@r-project.org/msg64699.html
I use trellis.device() to set the colors to FALSE. Whenever I call
the minimal
example below *with* trellis.device(), Quartz opens a window (I am
working on a
MAC), which it shouldn't,
Wrong. Please look at the default for the "device" argument in the
help page of trellis.device().
since I only want to create the plot, but do not intend
to "print" it. Moreover, if I check the value of b, it prints the
plot (which
is correct) but still with colors.
Without the trellis.device() call, it works fine (but of course the
plot is
again colored)...
The reason why I would like to use trellis.device() within a
function is that
the plot contains a panel.function which contains many calls to
panel.xyplot()
and I do not want to write "col = 1" (e.g.) all the time...
Cheers,
Marius
library(lattice)
Just take the trellis.device() line out of that function. Or specify a
proper device call as an argument to device= ....
xyplot. <- function(u) {
# trellis.device(color = FALSE)
xyplot(u[,2]~u[,1])
}
U <- matrix(runif(20),ncol=2)
b <- xyplot.(U)
str(b)
David Winsemius, MD
West Hartford, CT
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