In ColumnChart, how to stop displaying small column for zero value?

Question

I'm trying to create a ColumnChart that does not display a column when the value is zero. The chart currently looks like this:
This is a stacked column chart with red values representing Faults and green values representing Throughput. Each hour has an explicit value of zero for Faults. I don't want to see any red lines when the value is zero. Is there any way to accomplish this?
My code looks like this:
<mx:Script><![CDATA[
     import mx.collections.ArrayCollection;
     [Bindable]
     public var simpleStats:ArrayCollection = new ArrayCollection([
        {Hour:"0:00", Throughput:0, ThroughputThreshold:2000, Faults:0, MaxResponseTime:450, AvgResponseTime:200, MinResponseTime:180,
             AuthenticationAcceptance:50, AuthenticationRejection:0, AuthorizationAcceptance:50, AuthorizationRejection:0},    
        {Hour:"1:00", Throughput:0, ThroughputThreshold:2000, Faults:0, MaxResponseTime:450, AvgResponseTime:200, MinResponseTime:180,
             AuthenticationAcceptance:50, AuthenticationRejection:0, AuthorizationAcceptance:50, AuthorizationRejection:0},    
        {Hour:"2:00", Throughput:0, ThroughputThreshold:2000, Faults:0, MaxResponseTime:450, AvgResponseTime:200, MinResponseTime:180,
             AuthenticationAcceptance:50, AuthenticationRejection:0, AuthorizationAcceptance:50, AuthorizationRejection:0},    
        {Hour:"3:00", Throughput:5, ThroughputThreshold:2000, Faults:0, MaxResponseTime:450, AvgResponseTime:200, MinResponseTime:180,
             AuthenticationAcceptance:50, AuthenticationRejection:0, AuthorizationAcceptance:50, AuthorizationRejection:0},    
        {Hour:"4:00", Throughput:0, ThroughputThreshold:2000, Faults:0, MaxResponseTime:450, AvgResponseTime:200, MinResponseTime:180,
             AuthenticationAcceptance:50, AuthenticationRejection:0, AuthorizationAcceptance:50, AuthorizationRejection:0}
  ]]></mx:Script>
                                 <mx:ColumnChart id="trafficChart"
                                    dataProvider="{simpleStats}"
                                    showDataTips="true" width="500" height="100%" seriesFilters="[]"
                                    type="stacked">
                                    <mx:verticalAxis>
                                        <mx:LinearAxis title="Messages" id="a1"/>
                                    </mx:verticalAxis>                                   
                                    <mx:horizontalAxis>
                                       <mx:CategoryAxis
                                               id="TrafficTimeAxis"
                                            dataProvider="{simpleStats}"
                                            categoryField="Hour"
                                            />
                                    </mx:horizontalAxis>
                                    <mx:horizontalAxisRenderers>
                                        <mx:AxisRenderer axis="{TrafficTimeAxis}" canDropLabels="true"/>                                       
                                    </mx:horizontalAxisRenderers>                                            
                                    <mx:series>                                                                         
                                       <mx:ColumnSeries
                                            yField="Faults"
                                            displayName="Faults"
                                            fill="{sc2}"
                                            stroke="{s2}"
                                             minHeight="0">
                                       </mx:ColumnSeries>                                                                                                          
                                       <mx:ColumnSeries
                                            yField="Throughput"
                                            displayName="Throughput"
                                            fill="{sc1}"
                                            stroke="{s1}"
                                            minHeight="0">
                                        </mx:ColumnSeries>                                      
                                    </mx:series>
                                 </mx:ColumnChart>

Answer 1

Answered my own question!!
The solution is to set the stroke for the ColumnSeries to {noStroke}, which I defined like this:
    <mx:Stroke id="noStroke" color="0xFFFFFF" weight="0"/>
Note that if you define {noStroke} without a color property, black is used by default, which means that those columns that do appear show up in black stroke outline.
If there's a more elegant solution to the problem, please let me know...