Class: Company::Mapping::CosineSimilarity

Inherits:

Object

Object
Company::Mapping::CosineSimilarity

show all

Defined in:: lib/company/mapping/vector_similarity/cosine_similarity.rb

Overview

Implements Cosine Similarity between two non zero vectors and it measures the cosine of the angle between them.

Instance Method Summary collapse

#calculate(doc1, doc2) ⇒ Object

Calculates cosine similarity between two documents.

Instance Method Details

#calculate(doc1, doc2) ⇒ `Object`

Calculates cosine similarity between two documents. The documents are expressed as vectors of tokens (bag of words model).



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# File 'lib/company/mapping/vector_similarity/cosine_similarity.rb', line 8

def calculate(doc1, doc2)
  (dotProduct(doc1, doc2) / (Math.sqrt(d(doc1)) * Math.sqrt(d(doc2)))).round(4)
end