Possibly something similar to abline(v=seq(long.min, long.max, length=3) abline(h=seq(lat.min, lat.max, length=3)
? The above will add vertical and horizontal lines to an existing plot, and assumes that the plot is in long/lat coordinates. Of course, this ignores the fact that long/lat is not a cartesian coordinate system. (can't provide more detail without more information) -Don -- Don MacQueen Lawrence Livermore National Laboratory 7000 East Ave., L-627 Livermore, CA 94550 925-423-1062 -----Original Message----- From: Jaimin Dave <davejaim...@gmail.com> Date: Mon, 4 Apr 2011 18:39:45 -0700 To: "r-help@r-project.org" <r-help@r-project.org> Subject: [R] Grid on Map >I am new to R.I want to draw grid from a csv file which contains latitude >minimum ,latitude maximum ,longitude minimum ,longitude maximum.The grid >should be divided into exactly 4 quadrants. The map is of NY state of >USA. I >want to know how can I do it. >Help would be appreciated. > >Thanks >Jaimin > > [[alternative HTML version deleted]] > >______________________________________________ >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.