Method: FeatureSet::DataSet#output_numeric_arff

Defined in:
lib/feature_set/data_set.rb

#output_numeric_arff(io) ⇒ Object

This only knows how to output arfs with true/false classes and all numeric attributes. Additionally, every row must have the same attributes.



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# File 'lib/feature_set/data_set.rb', line 62

def output_numeric_arff(io)
  keys = features.first.keys
  io.puts "@RELATION Data"
  keys.each do |key|
    io.puts "@ATTRIBUTE #{key} NUMERIC" unless key == :class
  end
  io.puts "@ATTRIBUTE class {false,true}"
  io.puts "@DATA"
  features.each do |feature|
    io.puts keys.map { |k| k == :class ? feature[k].to_s : feature[k].to_f }.join(",")
  end
end