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Contents
module SocialStream
module Population
class PowerLaw
# Yields each element of array y times given by
# {power law distribution}[http://en.wikipedia.org/wiki/Power_law]
# y = ax**k + e
#
# Options: Each constant in the function
#
def initialize(array, options = {})
options[:a] ||= array.size
options[:k] ||= -2.5
options[:e] ||= 1
array.each do |i|
value = options[:a] * (array.index(i) + 1) ** options[:k] + options[:e]
value.round.times do
yield i
end
end
end
end
end
end
Version data entries
77 entries across 77 versions & 2 rubygems