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Spatial indexing of a point pattern

Wed, Jan 16, 2013 6:24 AM

Hi Aurelie,

If your points and grid are objects of the spatial class you can use the 
function "over" in the sp package.  The overlay of points on polygons 
returns a vector with the polygon index where each point is located.

Julian

Julian Mariano Burgos, PhD
Hafranns?knastofnunin/Marine Research Institute
Sk?lagata 4, 121 Reykjav?k, Iceland
S?mi/Telephone : +354-5752037
Br?fs?mi/Telefax:  +354-5752001
Netfang/Email: julian at hafro.is



On 01/16/2013 01:40 PM, Aurelie C.Godin wrote:
> Hello,
> I have a point pattern and a tessellation (grid). Is there a way to
> spatially index each of my points? In other words, my tessellation grid has
> /n/ quadrats, I would like to know for each of my points which of these
> /(1:n)/ quadrats they are associated with.
> If not, is there another way to do so?
> Many thanks for your suggestions!
>
>
>
> -----
> Aurelie Cosandey-Godin
> Ph.D. Student, Department of Biology, Dalhousie University
> Industrial Graduate Fellow, WWF-Canada
> Email: godina at dal.ca | Web: wormlab.biology.dal.ca
>
> --
> View this message in context: http://r-sig-geo.2731867.n2.nabble.com/Spatial-indexing-of-a-point-pattern-tp7582325.html
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>
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Thread (4 messages)

Aurelie Cosandey Godin Spatial indexing of a point pattern Jan 16 Seth Flaxman Spatial indexing of a point pattern Jan 16 Julian Burgos Spatial indexing of a point pattern Jan 16 Rolf Turner Spatial indexing of a point pattern Jan 16