Method: #plot

Defined in:
lib/texlab/plot.rb

#plot(*args) ⇒ Object 



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# File 'lib/texlab/plot.rb', line 13

def plot *args
  opts = args.extract_options!
  title = args[0]

  placement = opts.delete(:placement) || (opts[:label] ? "htbp" : "H")
  width   = opts.delete(:width) || "17cm"
  height = opts.delete(:height) || "10cm"
  cmd    = opts.delete(:cmd) || "plot"
  label = opts.delete(:label)
  debug = opts.delete(:debug)

  env :figure, "[#{placement}]" do
    env :center do
      @_datasets = []
      yield
      @_datasets

      gnuplot = Gnuplot.gnuplot(true) or raise "gnuplot not found"
      Open3.popen3(gnuplot) do |gp, out, err, external|
        gp = STDERR if debug
        gp <<<<-GP
          set terminal latex size #{width}, #{height}
        GP

        Gnuplot::Plot.new(gp, cmd) do |plot|
          opts.each do |key, value|
            case value
            when true
              plot.send key
            when false
              gp << "unset #{key}\n"
            else
              plot.send key, value.to_s.gsub(/([\\])/, "\\\\\\1")
            end
          end

          @_datasets.each do |ds|
            plot.data << ds
          end
        end
        gp.close
        $_erbout << out.readlines.join("\n")

        if not external.value.success?
          errlines = err.readlines
          raise "could not plot:\n" + errlines.join("\n")
        end
      end
    end
    $_erbout << "\\caption{#{title}}" if title
    $_erbout << "\\label{#{label}}" if label
  end
end