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I encountered a problem that I don't know where to or how to solve this. I can put Chinese text to a Quartz window. There is no problem to show the correct Chinese text string. However, when this Quartz window is saved, and open by Acrobat or Acrobat Reader, the Chinese text will become ........ In order to show/preserve my Chinese text in Quartz window, do I have to set up some parameters?

This maybe a silly question. I'm trying to figure out a way to draw a line from a data set which contain NA. Say, I have a set of data as: x <- c(1.1 2.2 NA 4.4 5.5) ; y <- c(1:5) # as x,y of point a, b, c, d, and e. I would like to plot this to a line by using dot-line to connect the two adjacent points before and after the NA, something like: (a)______(b)......(d)______(e) Any help