Multi line chart

Question

I have been pondering on this issue for a little while but
couldn't figure this out. I have this mxml file which shows
multiple lines in a chart. It has three arrays
1) SMITH
2) DECKER
3) JOHN
Now the question is that if I make SMITH null as in the code
pasted, DECKER and JOHN also disappear, but this does not happen if
SMITH is not null but DECKER is null. I want that if SMITH is null
the rest two lines should still appear. Please advise.
quote:
<?xml version="1.0"?>
<!-- charts/MultipleSeries.mxml -->
<mx:Application xmlns:mx="
http://www.adobe.com/2006/mxml"
width="100%"
height="100%">
<mx:Script>
<![CDATA[
[Bindable]
public var SMITH:Array = null;/* [
{date:"22-Aug-05", close:45.87},
{date:"23-Aug-05", close:45.74},
{date:"24-Aug-05", close:45.77},
{date:"25-Aug-05", close:46.06},
[Bindable]
public var DECKER:Array = [
{date:"22-Aug-05", close:45.59},
{date:"23-Aug-05", close:45.3},
{date:"24-Aug-05", close:46.71},
{date:"25-Aug-05", close:46.88},
public var JOHN:Array = [
{date:"22-Aug-05", close:48.87},
{date:"23-Aug-05", close:44.74},
{date:"24-Aug-05", close:45.77},
{date:"25-Aug-05", close:47.06},
]]>
</mx:Script>
<mx:Panel title="Multiple Data Series" width="100%"
height="100%">
<mx:LineChart id="mychart"
dataProvider="{SMITH}"
showDataTips="true"
height="100%"
width="100%"
>
<mx:horizontalAxis>
<mx:CategoryAxis categoryField="date"/>
</mx:horizontalAxis>
<mx:verticalAxis>
<mx:LinearAxis minimum="40" maximum="50"/>
</mx:verticalAxis>
<mx:series>
<mx:LineSeries
dataProvider="{SMITH}"
xField="date"
yField="close"
displayName="SMITH"
>
</mx:LineSeries>
<mx:LineSeries
dataProvider="{DECKER}"
xField="date"
yField="close"
displayName="DECKER"
>
</mx:LineSeries>
<mx:LineSeries
dataProvider="{JOHN}"
xField="date"
yField="close"
displayName="DECKER"
>
</mx:LineSeries>
</mx:series>
</mx:LineChart>
</mx:Panel>
</mx:Application>

Answer 1

Can't you just set the LineSeries visible=false?
<mx:LineSeries visible="false"
dataProvider="{SMITH}"
xField="date"
yField="close"
displayName="SMITH"
>
Not sure exactly what you are trying to achieve.