条形图不能渲染空条 - JQPlot

Question

我有一个JQPlot条形图的场景，如果系列数据是0或null，它根本不应该为条形图渲染空间。 Here is my fiddle，

please feel free to fiddle with it!
OR

$.jqplot.config.enablePlugins = true;
var s1 = [20, 60, 70, 80];
var s2 = [30, 10, 20, 10];
var s3 = [10, 20, 10, 10];
var s4 = [50, 1, undefined, undefined];
var s5 = [undefined, 1, 20, undefined];

var ticks = ['1999', '2004', '2009', '2014'];

plot1 = $.jqplot('chart1', [s1, s2, s3, s4, s5], {
  // Only animate if we're not using excanvas (not in IE 7 or IE 8)..
  animate: !$.jqplot.use_excanvas,
  seriesDefaults: {
    renderer: $.jqplot.BarRenderer,
    pointLabels: {
      show: true
    }
  },
  axes: {
    xaxis: {
      renderer: $.jqplot.CategoryAxisRenderer,
      ticks: ticks
    }
  },
  highlighter: {
    show: false
  }
});

$('#chart1').bind('jqplotDataClick', function(ev, seriesIndex, pointIndex, data) {
  $('#info1').html('series: ' + seriesIndex + ', point: ' + pointIndex + ', data: ' + data);
});

<link href="https://cdnjs.cloudflare.com/ajax/libs/jqPlot/1.0.9/jquery.jqplot.css" rel="stylesheet" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jqPlot/1.0.9/jquery.jqplot.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jqPlot/1.0.9/plugins/jqplot.barRenderer.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jqPlot/1.0.9/plugins/jqplot.categoryAxisRenderer.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jqPlot/1.0.9/plugins/jqplot.pointLabels.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jqPlot/1.0.9/plugins/jqplot.cursor.js"></script>


<div id="chart1" style="margin-top:20px; margin-left:20px; width:600px; height:300px;"></div>

这是我得到的结果：

这是我想要的结果：

正如您所看到的那样，它不会呈现空或0条