Packages

simple_bayes

0.4.4
1.0.0 0.12.2 0.12.1 0.12.0 0.11.0 0.10.0 0.9.0 0.8.0 0.7.1 0.7.0 0.6.0 0.5.2 0.5.1 0.5.0 0.4.4 0.4.3 0.4.2 0.4.1 0.4.0 0.3.1 0.3.0 0.2.0 0.1.1 0.1.0

A Simple Bayes (a.k.a. Naive Bayes) implementation in Elixir.

HexDocs

Current section

Files

Jump to
Readme
24 Versions
0 Dependencies
Dependants
Files
Activity
simple_bayes lib simple_bayes tf_idf.ex
Raw

lib/simple_bayes/tf_idf.ex 

defmodule SimpleBayes.TfIdf do

  @doc """

  Calculates the TF-IDF.



  ## Examples



      iex> SimpleBayes.TfIdf.call(2, 0, 1)

      2



      iex> SimpleBayes.TfIdf.call(2, 1, 0)

      2



      iex> SimpleBayes.TfIdf.call(2, 1, 1)

      2



      iex> SimpleBayes.TfIdf.call(2, 2, 1)

      0.6020599913279624

  """

  def call(tf, numerator, denominator) do

    cond do

      denominator == 0         -> tf

      numerator   == 0         -> tf

      denominator == numerator -> tf

      true                     -> tf * :math.log10(numerator / denominator)

    end

  end

end