First, skyline is an anomaly detection tool published by Etsy. It use numpy/scipy to implement 9 detection algorithms. You can find it at http://github.com/etsy/skyline.git

I have heard PDL for a long time, and then I thought: maybe I can re-implement those algorithms using PDL? This must be the best way to learn PDL!

Now, I got it done.

I should say that PDL is not so easy to write as numpy. For example: you must write '$p->i…