Re: [R] Moran I for very large data set

2010-11-30 Thread Roger Bivand
First, 14000 is not a large data set, unless you are trying to create a dense matrix, which will probably tax your computer, and is not necessary. Second, you haven't indicated how you are doing this, by quoting the salient parts of the code you are using - it may well be that your approach is

Re: [R] Moran I for very large data set

2010-11-30 Thread Mike Marchywka
Date: Tue, 30 Nov 2010 04:51:10 -0800 From: roger.biv...@nhh.no To: r-help@r-project.org Subject: Re: [R] Moran I for very large data set First, 14000 is not a large data set, unless you are trying to create a dense matrix, which

[R] Moran I for very large data set

2010-11-29 Thread Watmough G.
Hi Are there any more efficient ways of calculating the neighbourhood object for large datasets? I am trying to compute Moran I statistics for a very large data set (over 14,000 points). I have been using moran.test from the spdep package and everything works fine for a small data set (200