Thank you Roger, your professional knowledge has rebuilt my confidence in spdep.
As to the example, I have a new understanding: when a 'cold spots' was put in the center, the surrounding grids became 'hot spots' relatively, it explained the result when distance was set to 1 unit. The idea of 'high' and 'low' in global G is comparative, not measured by mean value. I will take the example to CrimeStat. Merry Chrismas everyone! -- View this message in context: http://r-sig-geo.2731867.n2.nabble.com/about-global-getis-g-tp7587571p7587579.html Sent from the R-sig-geo mailing list archive at Nabble.com. _______________________________________________ R-sig-Geo mailing list R-sig-Geo@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-geo
