 
     [start, end] = @get('bounds')
 
-    loc = @get('guidespec').location
+    loc = @get('guidespec').location ? 'min'
     cstart = cross_range.get('start')
     cend = cross_range.get('end')
 


class LinearAxes extends Backbone.Collection
   model: LinearAxis
exports.linearaxes = new LinearAxes()
exports.LinearAxis = LinearAxis
exports.LinearAxisView = LinearAxisView

    interval = ticking.auto_interval(start, end)
    ticks = ticking.auto_ticks(null, null, start, end, interval)

    loc = @get('guidespec').location ? 'min'
    if _.isString(loc)
      if loc == 'left' or loc == 'bottom'
        loc = 'start'
