[R-sig-Geo] Point pattern add covariates

[Barry Rowlingson]

On Mon, Jul 23, 2012 at 2:26 PM, Jose Funes <jefunes at gmail.com> wrote:
> Dear list,
> I have point pattern data and would like to attach/add covariates as raster
> (image or grid) to it. For example as the case of the bei data with
> bei.extra with covariates.

 You want to get the values of a raster at a set of points?

 Try extract(points,raster) from the raster package. [or it might be
extract(raster,points)].

 'points' is a SpatialPoints object (or SPDataFrame) and 'raster' is a
raster or stack object from the raster package.

Barry