I was more thinking of spatial stuff when I talked about paths, and PostGIS is a pretty productive platform for me so far. Example calculations would be taking

I was more thinking of spatial stuff when I talked about paths, and PostGIS is a pretty productive platform for me so far. Example calculations would be taking the geodesic distance moved over a series of events over the total length of the path to calculate a score for 'directness'. PostGIS has aggregates to create lines from points, measure the total length etc.