Sha256: 7b4537682a68e1ff1d852af42bca78fd876295cbec9c7d80f209755f777a6752
Contents?: true
Size: 702 Bytes
Versions: 4
Compression:
Stored size: 702 Bytes
Contents
module Enumerable
# Generates a hash mapping each unique element in the array
# to the relative frequency, i.e. the probablity, of
# it appearence.
#
# CREDIT: Brian Schröder
def probability
probs = Hash.new(0.0)
size = 0.0
each do | e |
probs[e] += 1.0
size += 1.0
end
probs.keys.each{ |e| probs[e] /= size }
probs
end
# old def
#
# def probability
# arr = self.to_a
# probHash = Hash.new
# size = arr.size.to_f
# arr.uniq.each do |i|
# ct = arr.inject(0) do |mem,obj|
# obj.eql?(i) ? (mem+1) : mem
# end
# probHash[i] = ct.to_f/size
# end
# probHash
# end
end
Version data entries
4 entries across 4 versions & 2 rubygems