Class: Uranai::Data

Inherits:
Object
  • Object
show all
Defined in:
lib/uranai/data.rb

Instance Method Summary collapse

Constructor Details

#initialize(csv) ⇒ Data

Returns a new instance of Data.



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# File 'lib/uranai/data.rb', line 6

def initialize(csv)
  @data = CSV.read(csv).map { |arr| arr.map(&:to_f) }.transpose
end

Instance Method Details

#column_size ⇒ Object 



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# File 'lib/uranai/data.rb', line 10

def column_size
  data.length
end

#feature_size ⇒ Object 



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# File 'lib/uranai/data.rb', line 19

def feature_size
  column_size - 1
end

#matrix_x ⇒ Object 



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# File 'lib/uranai/data.rb', line 33

def matrix_x
  Matrix.columns(x)
end

#matrix_y ⇒ Object 



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# File 'lib/uranai/data.rb', line 45

def matrix_y
  Matrix.columns(y)
end

#normalized_matrix_x ⇒ Object 



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# File 'lib/uranai/data.rb', line 37

def normalized_matrix_x
  Matrix.columns(normalized_x)
end

#normalized_x ⇒ Object 



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# File 'lib/uranai/data.rb', line 27

def normalized_x
  FeatureNormalizer.new(raw_x)
    .normalize
    .insert(0, [1] * row_size)
end

#row_size ⇒ Object Also known as: training_example_size 



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# File 'lib/uranai/data.rb', line 14

def row_size
  data.transpose.length
end

#x ⇒ Object 



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# File 'lib/uranai/data.rb', line 23

def x
  raw_x.insert(0, [1] * row_size)
end

#y ⇒ Object 



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# File 'lib/uranai/data.rb', line 41

def y
  [data[-1]]
end