Have you tried spRbind?

On Wed, Sep 14, 2011 at 4:42 AM, Jonathan Greenberg
<greenberg@ucdavis.edu>wrote:

> R-sig-geo'ers:
>
> I apologize that I can't provide the input data, but maybe the info
> below can illuminate the problem.  Basically, I'm trying to rbind two
> SpatialPolygonDataFrames together, but I'm getting a strange error:
>
> 'no method or default for coercing "logical" to "SpatialPolygons"'
>
> Does rbind only work on SpatialPolygons (e.g. should I rbind the
> SpatialPolygons and the data.frame separately, then piece them back
> together afterwards?)
>
> Note the "replacement" call was because I couldn't figure out how to
> do.call(rbind) and pass along the "makeUniqueIDs=TRUE"
>
> > i=2
> >
> boundary_vectors=rbind(boundary_vectors,boundary_vectors_unmerged[[i]],makeUniqueIDs=TRUE)
> Error in as(x, "SpatialPolygons") :
>  no method or default for coercing "logical" to "SpatialPolygons"
> > class(boundary_vectors)
> [1] "SpatialPolygonsDataFrame"
> attr(,"package")
> [1] "sp"
> > class(boundary_vectors_unmerged[[i]])
> [1] "SpatialPolygonsDataFrame"
> attr(,"package")
> [1] "sp"
>
> This was a single step from a larger looping I used in lieu of do.call:
>
> > class(boundary_vectors_unmerged)
>        for(i in (1:length(boundary_vectors_unmerged)))
>        {
>                print(i)
>                if(i==1)
>                {
>                        boundary_vectors=boundary_vectors_unmerged[[i]]
>                } else
>                {
>
>  boundary_vectors=rbind(boundary_vectors,boundary_vectors_unmerged[[i]],makeUniqueIDs=TRUE)
>                }
>        }
>
>
> --j
>
> --
> Jonathan A. Greenberg, PhD
> Assistant Project Scientist
> Center for Spatial Technologies and Remote Sensing (CSTARS)
> Department of Land, Air and Water Resources
> University of California, Davis
> One Shields Avenue
> Davis, CA 95616
> Phone: 415-763-5476
> AIM: jgrn307, MSN: jgrn307@hotmail.com, Gchat: jgrn307
>
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>



-- 
best,

Adam Sparks
Post-Doctoral Fellow
IRRI
DAPO Box 7777
Metro, Manila
Los Baños, Laguna, Philippines

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