This is an r-help question - please post to the relevant list next time. The problem is with your "dev.off(dev.prev())" lines - you should have used just "dev.off()" plain, without the dev.prev() inside. As for why, please read the help pages.
Giampiero Salvi wrote: > Hi, > I am trying to produce incremental plots directly using the pdf > device. I mean that I want to produce a plot, save it in a pdf > file, then add details and save the new plot in a new file, and > so on. Before I used to do this with x11, by just adding graphics to > a plot and then using dev.copy2eps at the right times for each eps > figure. Now I want to do this in batch mode and the x11 device is not > available. > > This is how I go about it: > > pdf(file="file1.pdf") # create the first plot > dev.control(displaylist='enable') # allow copying print devices > plot(1:10) # first plot > dev.copy(pdf,file="file2.pdf") # create the second plot > dev.control(displaylist='enable') > dev.off(dev.prev()) # close the first plot > points(2,3) # add to the second plot > dev.copy(pdf,file="file3.pdf") # create the third plot > dev.off(dev.prev()) # close the second plot > points(3,2) # add to the third plot > dev.off() > > The problem is this works only for the first two plots. For the > third I get an error at "dev.copy(pdf,file="file3.pdf")" > > Error in dev.copy(pdf, file = "file3.pdf") : > invalid graphics state > > I also tried to remove the second dev.control statement, but in > that case the same error is delayed to the "points(3,2)" line > (plotting in the third plot). > > Is this behaviour expected? Is there a better way to do what I'm > trying to do? > > Thank you! > Giampiero > ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
