[R] pdf() function, screen command and graphs

[Dominique Couturier]

Dear [R]-list,

I am trying to do a pdf() of the following graphs but don't understand 
why the pdf() function does produce an empty pdf file.
(I use R1.7.0 on MacOS 10.2.8)
any idea? Is pdf() incompatible with screen?
Thanks a lot,
DLC

## create dataset
x=rnorm(1000,10,2)
y=rpois(1000,5)

## graphs
  pdf()
   par(col.main=4,omi=c(0,0,1.25,0))
         split.screen(c(1,2))
         screen(1);split.screen(c(2,1))

         screen(3) ## gauche en haut
         boxplot(x,col=3,main="my boxplot")

         screen(2) ## droite seul
         barplot(table(y),col=4,main="my barplot")

         screen(4) ## gauche en bas
         qqnorm(x,main="mon qqnorm");qqline(x,col=5)
         mtext(paste("Graphics are important","\n","I love 
R"),side=3,col=2,cex=1.5,outer=T)
   dev.off()

## remove dataset
  rm(x,y)