Anticipated and surprising values
Anticipated value ai1i2…in at dimension dr (1?r?n) function f of various abstraction levels
Value yi1i2…in is an “exception” if si1i2…in>? (= 2.5)
f can return
- sum of arguments
- product of arguments
? is estimated as mean value over all cells raised to power p (maximum likelihood principle)
si1i2…in = ---------------------