[R-sig-Geo] Changing coords in SpatialPolgyon

[Nick Matzke]

That fixed it!  Thanks VERY much!!

Thanks again,
Nick

On 9/13/12 4:25 AM, Edzer Pebesma wrote:
> Thanks, Nick.
>
> what works, and probably does what you want, is this:
>
> slot(all_emerged_islands_at_this_height_break at polygons[[1]]@Polygons[[1]],
>   "coords", check=FALSE) = slot(tmppoly_shrunken, "coords")
>
> I replaced here
>
> all_emerged_islands_at_this_height_break[j]
>
> with
>
> all_emerged_islands_at_this_height_break
>
> selection-assignment replaces whole objects, not just its first element.
> As you address @polygons[[1]] you do make sure the replacement concerns
> the first element only.
>
> Your (somewhat understandable) assumption was that SpatialPolygons
> objects have a [<- method, but they don't (none of the Spatial* objects do).
>
> The error message "object of type 'S4' is not subsettable" is not very
> enlightening. I'll think of adding a [<- method that only gives an error
> message that is more helpful.
>
> Best regards,
> --

-- 
====================================================
Nicholas J. Matzke
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