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# File 'lib/feature_set/data_set.rb', line 38
def to_rarff
relation = Rarff::Relation.new(name || 'Data')
keys = features.first.keys
instances = features.map do |row|
keys.map do |key|
value = row[key]
if value.is_a?(String)
value.gsub(/\\/, "\\\\\\\\").gsub(/"/, "\\\\\"").gsub(/'/, '\\\\\'')
elsif value.is_a?(Symbol)
value.to_s
else
value
end
end
end
relation.instances = instances
keys.each_with_index do |key, index|
relation.attributes[index].name = key.to_s
end
relation
end
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