[R] SPDEP Package, neighbours list for Moran's I on large grid dataset

From: Laurent Jégou <jegou_at_univ-tlse2.fr>
Date: Tue, 19 Apr 2011 11:34:32 +0200


Hello list members, i'd like to calculate the Moran I on a large dataset, a 8640x3432 grid of values.

When i try to create the neighbours list with the cell2nb function, on such a scale, R works for several hours and seems to crash. I'm using the last version (2.13), 64 bits, on a mac pro with 4go of memory.

I think that i'm doing it wrong :-)

I'd like to use a "moving window" weight matrix instead of a full scale one, but i was not lucky enough to find a solution in the docs.

Thanks for any help,

Laurent

-- 
Laurent Jégou
Cartographe et enseignant
UTM - Dépt. Géographie
31058 TOULOUSE Cedex 9 - 05.61.50.43.89
http://www.univ-tlse2.fr/geoprdc

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Received on Tue 19 Apr 2011 - 11:54:19 GMT

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