INNER CODE UNIT · Ruby

convert_to_matrix

yoshoku/rumale · rumale-core/lib/rumale/dataset.rb:196

      def convert_to_matrix(data, n_features, dtype)
        mat = []
        data.each do |ft|
          vec = Array.new(n_features) { 0 }
          ft.each { |el| vec[el[0]] = el[1] }
          mat.push(vec)
        end
        dtype.asarray(mat)
      end

      def detect_dtype(data)
        arr_type_str = Numo::NArray.array_type(data).to_s
        type = '%s'
        type = '%d' if ['Numo::Int8', 'Numo::Int16', 'Numo::Int32', 'Numo::Int64'].include?(arr_type_str)
        type = '%d' if ['Numo::UInt8', 'Numo::UInt16', 'Numo::UInt32', 'Numo::UInt64'].include?(arr_type_str)
        type = '%.10g' if ['Numo::SFloat', 'Numo::DFloat'].include?(arr_type_str)
        type
      end

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