# File lib/ruote/reader.rb, line 238
    def self.to_expid_radial(tree)

      lines = to_raw_expid_radial(tree, '0')
      max = lines.collect { |l| l[1].length }.max

      lines.collect { |l|
        "%#{max}s  " % l[1] + "  " * l[0] + l[2] + l[3]
      }.join("\n")
    end