Method: LicenseMatcher::TFRubyMatcher#cos_sim

Defined in:
lib/license_matcher/tf_ruby_matcher.rb

#cos_sim(mat1, mat2) ⇒ Object

Calculates cosine similarity between 2 TF-IDF vector



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# File 'lib/license_matcher/tf_ruby_matcher.rb', line 75

def cos_sim(mat1, mat2)
  length = (mat1 * mat2).sum
  norm   = Math::sqrt((mat1 ** 2).sum) * Math::sqrt((mat2 ** 2).sum)

  ( norm > 0 ? length / norm : 0.0)
end