Class: Vector

Inherits:
Object show all
Defined in:
lib/classifier/extensions/vector.rb

Constant Summary collapse

EPSILON = 
1e-10

Instance Method Summary collapse

Instance Method Details

#magnitude ⇒ Object 



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# File 'lib/classifier/extensions/vector.rb', line 29

def magnitude
  # Cache magnitude since Vector is immutable after creation
  @magnitude ||= begin
    sum_of_squares = 0.to_r
    size.times do |i|
      sum_of_squares += self[i]**2.to_r
    end
    Math.sqrt(sum_of_squares.to_f)
  end
end

#normalize ⇒ Object 



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# File 'lib/classifier/extensions/vector.rb', line 40

def normalize
  magnitude_value = magnitude
  return Vector[*Array.new(size, 0.0)] if magnitude_value <= 0.0

  normalized_values = []
  size.times do |i|
    normalized_values << (self[i] / magnitude_value)
  end
  Vector[*normalized_values]
end