DC and VCS

I've generally considered the time dimension a pretty blunt/naive approach (I think I used it in [[Lukious]]), but I've been mulling it for the last hour and now I'm thinking it's actually pretty reasonable. I might even tinker with it some in Diamond (especially now that I have your secret formula, muahahaha!).

I know I've posted it elsewhere, but the main system I use in decaying Diamond's surf stats is like this:
* No time dimension, but each data point is timestamped.
* After choosing k neighbors, sort them inverse chronologically and weight them by rank. (Eg, 16/8/4/2/1.)
* Optionally (like in flattener), I also cap the size of the log and remove the oldest points.

Tuning k is like adjusting the granularity of a VCS buffer: k=1 is like a super highly segmented buffer (most similar situation wins, regardless of age), while a larger k is like a less segmented buffer with rolling average.

While I've tried this in my Anti-Surfer gun, too, the most effective decay I've found there is just capping the size of the log and discarding old points.