Thanks! On Wed, May 25, 2011 at 12:40 PM, Roger Bivand <[email protected]> wrote: > On Wed, 25 May 2011, geetha ramaswami wrote: > >> Hi, >> >> I am trying to do some join count statistical analysis on my data (a >> grid of 5000 cells with values 1 or 0) in order to determine whether >> there is spatial clustering of pixels. Is there a built-in function >> available in any of the spatial stats packages of R (I cannot seem to >> locate it, if it is present)? > > See joincoint.test() in spdep for the original Cliff/Ord test. You'll need > to construct a weights object, probably using dnearneigh() and nb2listw() in > the same package, and ensure that the input data are in vector form in the > same order as the weights. See also the examples for joincoint.test() and > joincoint.multi(). > > Roger > >> >> Geetha >> >> _______________________________________________ >> R-sig-Geo mailing list >> [email protected] >> https://stat.ethz.ch/mailman/listinfo/r-sig-geo >> > > -- > Roger Bivand > Economic Geography Section, Department of Economics, Norwegian School of > Economics and Business Administration, Helleveien 30, N-5045 Bergen, > Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43 > e-mail: [email protected] > >
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