[R-sig-Geo] Alternative to zonal for large images

[Ned Horning]

Thanks to everyone who responded to my question. This morning I tried 
the approach suggested by Oscar Perpiñán Lamigueiro and was very 
impressed. It is very fast, didn't consume excessive memory, and it 
provides enough flexibility to use different statistics. It also 
introduced me to the data.table package which I expect will come in 
handy for lots of other applications.

All the best,

Ned

On 02/12/2013 06:30 PM, Oscar Perpiñán Lamigueiro wrote:
> Hello,
>
> I think that the combination of the raster and data.table packages can
> be really useful. For example, here it is a very simplified version of
> zonal using the data.table methods. It provides the same results about
> 10 times faster.
>
> Best,
>
> Oscar.
>