class Company::Mapping::NormalizedTermFrequency
NormalizedTermFrequency
inherits from TermFrequency
class. It calculates Term Frequency as logarithmically scaled frequency: tf(t,d) = 1 + log(f(t,d)), or zero if f(t,d) is zero.
Public Instance Methods
calculate(text)
click to toggle source
# File lib/company/mapping/tfidf/tf/normalized_term_frequency.rb, line 9 def calculate(text) rawFrequency(text).each_with_object({}) do |(key, value), logTF| logTF[key] = 1.0 + Math.log(value) end end