Canberra Distance
Calculates the Canberra distance between two vectors.
See http://en.wikipedia.org/wiki/Canberra_distance.
Usage
require 'canberra_distance'
CanberraDistance.calculate([1, 1], [3, 7])
#=> 1.25
CanberraDistance.calculate([-1, 2, -3], [0, 0, -1])
#=> 2.5
Contribution
Feel free to contribute. No commit is too small.
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