Re: [R] Error in multiple xyplots

Roger D. Peng Mon, 23 Feb 2004 08:25:33 -0800

You cannot use par(), which is part of the base graphics system, with xyplot(), which is part of the lattice/grid system. If you want to combine base-graphics with lattice/grid you need to use the `gridBase' package on CRAN.

-roger

Rodrigo Abt wrote:

Dear R-listers,

I got an error when I try to plot two grouped data into a single
win.metafile device:

library(lattice)
trellis.device(device="win.metafile",color=F,filename="Profiles-Var1.wmf")
par(mfrow=c(1,2))

# First plot
xyplot(log(v)~t|id,data=Con.20,
main="Group A: Control, Var-1",
xlab="ocasion",ylab="var1",
panel=function(x,y) {
        m<-sort.list(x)
        panel.grid()
        panel.xyplot(x[m],y[m],type="b",cex=0.8)
        }
)

# Second plot
xyplot(log(v)~t|id,data=Trt.20,
main="Group B: Treat, Var-1",
xlab="ocasion",ylab="var1",
panel=function(x,y) {
        m<-sort.list(x)
        panel.grid()
        panel.xyplot(x[m],y[m],type="b",cex=0.8)
        }
)

When then last plot is entered, a messagebox pops up an says "Unable to
create metafile", and R shutdowns. However, if I use simple plots instead of
xyplots, then it works:

trellis.device(device="win.metafile",color=F,filename="Simple-Plots.wmf")
par(mfrow=c(1,2))

# First plot
plot(1:10,rnorm(10),main="Plot 1")

# Second plot
plot(1:10,rnorm(10),main="Plot 2")

No error, so I call dev.off() and the file generated is OK.

I tried plotting the data in separate 'win.metafile' devices (files) and
worked perfect. I've read the R help, googled around and searched the R-list
for a similar problem and found nothing...any clues ?

I'm working with win2K and R-1.8.1.

Regards,

Rodrigo Abt B,
Analyst,
Dept. Economic Studies,
SII, Chile.

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Re: [R] Error in multiple xyplots

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