[R] densityplot png in a for loop

[Albert Vilella]

Hi all,

I am trying to plot a list of densityplots as png files, but when I do
it in a for loop, I get empty png files as a result.

If I manually run the instructions inside the loop, it works... any hints?

library(lattice)
names_list = c("alfa","beta","gamma")
for (i in 1:length(names_list)) {
  pngfile = paste("example_",names_list[i],".png", sep="")
  png(file=pngfile, width=1280,height=1024)
  input = rnorm(1000,i)
  densityplot(~input,
              plot.points=FALSE,
              auto.key=TRUE
              )
  dev.off()
}

Thanks,

    Albert.