On Monday 30 June 2003 15:23, Barry Rowlingson wrote: > Think you may be looking at the wrong sort of spatial correlation! For > Geary tests you are comparing 'adjacent' objects, where adjacency is > defined however you want - N-nearest neighbours, shared border between > regions etc etc.
sorry, I misunderstood the purpose of geary's I test, thanks for this info. > When you say 'sampled data' it sounds more like you've got samples > taken at locations, and you want to investigate spatial correlation as a > function of distance between samples? Am I guessing right? Yes you are right. I want to look for spatial correlation of my samples as a function of distances between sampling sites (x,y coords). > Take a look at some of the R kriging libraries, which will have > functions to plot variograms. This is a plot of something like > E(|Y_i - Y_j|) against distance. > > Baz I found variograms() and correlograms(), but is there a way to get the a p-value for spatial correlation? additionaly I found sp.correlogram() but again with this mysterious "nb class". thanks, martin ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
