Thank you Sarah. I tried your suggestion, and if I coerce it into a normal data.frame, that method works. But if you've already made the data into a SpatialPixelsDataFrame and run coordinates (both from the package "sp") so that the columns "x" and "y" become a single column "coordinates" with the format (0, 17) for x and y, how do you then call or manipulate data at a specific location?
The following: e[e$coordinates==(0,17),] Doesn't work. -----Original Message----- From: Sarah Goslee [mailto:sarah.gos...@gmail.com] Sent: Wednesday, October 12, 2011 5:34 PM To: Bailey, Daniel Cc: r-help@r-project.org Subject: Re: [R] getting data associated with coordinates in a spatial data frame Hi, On Wed, Oct 12, 2011 at 3:37 PM, Bailey, Daniel <bai...@spu.edu> wrote: > If I know the specific coordinate in a spatial data frame, how can I access > the data at that coordinate? > > My coordinates are labeled "x" and "y" in a data.frame "e". The data is in > column "leachate". > I want to say, basically: > e$leachate@coordinates(2,3<mailto:e$leachate@coordinates(2,3>). That's kind of mangled, but what about: e[e$x == my.x & e$y == my.y, "leachate"] (Depending on the form of your coordinates, you may also have to invoke FAQ 7.31.) Sarah > Thanks, Daniel > -- Sarah Goslee http://www.functionaldiversity.org ______________________________________________ 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.
