# File lib/ai4r/classifiers/multilayer_perceptron.rb, line 102
      def data_to_input(data_item)
        input_values = Array.new(@inputs, @inactive_node_value)
        accum_index = 0
        data_item.each_index do |att_index|
          att_value = data_item[att_index]
          domain_index = @domains[att_index].index(att_value)
          input_values[domain_index + accum_index] = @active_node_value
          accum_index = @domains[att_index].length
        end
        return input_values
      end