getting data associated with coordinates in a spatial data frame
Hi,
On Wed, Oct 12, 2011 at 3:37 PM, Bailey, Daniel <bailed at 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$leachate at coordinates(2,3<mailto:e$leachate at 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