« What a real flu pandemic looks like | Main | Visualizing a horse-race »

May 08, 2009


Feed You can follow this conversation by subscribing to the comment feed for this post.

The GiZScore is the Z-Score from the Gi* test for spatial clusters. The Gi* (aka the GI star, see Ord, J.K., and A. Getis. 1995. Local Spatial Autocorrelation Statistics: Distributional Issues and an Application. Geographical Analysis 27(4): 286-306) Z-Scores define clusters of neighbors with more in common to adjacent neighbors than less; a cluster map. In terms of statistical analysis, this means you neighbor has more in common than less, and so as the bandwidth (distance from one neighbor to the next) increases, the relationship decreases.

No metric is prefect if a human defines it, and that is the beauty of science.

The comments to this entry are closed.

Search Revolutions Blog

Got comments or suggestions for the blog editor?
Email David Smith.
Follow revodavid on Twitter Follow David on Twitter: @revodavid
Get this blog via email with Blogtrottr