class MetricSpace::Maximum
Maximum
metric, Chebyshev distance, also known as chessboard distance, since in the game of chess the minimum number of moves needed by a king to go from one square on a chessboard to another equals the Chebyshev distance between the centers of the squares
Public Class Methods
distance(one, two)
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Distance between two points in Maximum
(Chebyshev) metrics
self.distance({a:2.5, b:5.0, c:1.0}, {a:-1.5, b:1.5, c:0.5}) #=> 4.0 self.distance({a:-1.5, b:3.0, c:-1.5}, {b:1.0, c:2.5, d:5.0}) #=> 5.0
# File lib/metric_space/maximum.rb, line 11 def self.distance(one, two) array, max = (one.keys + two.keys).uniq, 0.0 array.each do |index| value = difference(one, two, index) max = value if value > max end max end