Using my mind-reading skills, plot.Map(), while deprecated, does provide an add= option.
If this doesn't help, you'll need to read the posting guide and provide (a lot) more information. Ray Brownrigg On Thu, 19 May 2011, michael.laviole...@dhhs.state.nh.us wrote: > I'm having difficulty overlaying maps when writing to a file graphics > device. My command sequence has the structure > > plot(map1) > par(new = T) > plot(map2) > > On the screen device, it works fine. When I attempt something like > > png(file = "map.png") > plot(map1) > par(new = T) > plot(map2) > dev.off() > > only the last map appears, the previous ones having been cleared. Can > someone clarify? > > Thanks, > Michael Laviolette PhD MPH > New Hampshire Department of Health and Human Services > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html and provide commented, > minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
