I've tried out the Hot Spot Map tutorial for ArcMap, which is working just fine, and I'm now starting to make some modifications so that it fits my data sets. Instead of aggregating the points as in the tutorial I added a column for the weighting.
What I'm trying to do now is to repoduce these results via MATLAB, just to get an idea of how the algorithm, which is described here, works. If I'm getting it right, the GI-score is calculated from the distance between one feature and all the others and their weighting.
As you can see, it looks like all the hot spots and cold spots are located in stripes.
Does ArcMap use a different algorithm from what is stated in the documentation or am I missing out on something else?
FYI, I used the default settings for the Hot Spot Analysis tool.