       outer_width:   options.width  + 2*options.border
       outer_height:  options.height + 2*options.border
       tools: []
+      title: ""
     )
 
     xaxis = Collections('GuideRenderer').create(

      border: options.border
      border_left: 80
      tools: []
    )

    xaxis = Collections('GuideRenderer').create(

      for i in [0..@idx.length-1]
        @idx[i] = @xrange.get('start') + (i/@idx.length)*@xrange.get('end')

    @source.set('data', {idx: @idx, ys: ys})
    @source.trigger('change', @source, {})

  set_xrange: (x0, x1) ->
