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.

Reply via email to