Inverted Parabola: Making the median be the highest rank

AI Machine Learning
1

For x as a factor: in a node -(x - median(x))^2 or Frank(-(x - median(x))^2)

You can replace median() with mean() or any raw number to make it be the highest rank.

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2

Median requires x1,x2...xN. How can you use this with a simple growth factor?