Am just feeling my way into the grid library, and cannot figure out how to define the plot limits. 3/5 of the example polygons below plot in the default 0-1 range viewport. But when I try to redefine the viewport the polygons plot in the same places. I also get the same result without employing push/pop. (As you can see from the scale I'm trying to introduce, I want to plot map polygons.) Grateful for an idea where I'm going wrong.
pushViewport(viewport(xscale=c(-180,180),yscale=c(-90,90))) grid.polygon(x=c(0,5,5,0)/100, y=c(0,0,5,5)/100, draw = T) grid.polygon(x=c(100,95,95,100)/100, y=c(100,100,95,95)/100, draw = T) grid.polygon(x=c(50,70,70,50)/100, y=c(50,50,70,70)/100, draw = T) grid.polygon(x=-c(10,10,40,40)/100, y=c(10,40,40,10)/100, draw = T) #NEGATIVE X grid.polygon(x=c(50,52,52,50)/100, y=-c(50,50,52,52)/100, draw = T) #NEGATIVE Y popViewport() Thanks in advance. -- View this message in context: http://r.789695.n4.nabble.com/Defining-a-viewport-scale-in-Grid-tp4393974p4393974.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.
