Bug 193263 Inconsistent result of average function between Chart and Table[0001]
Description: Set average function on Chart and Table, get the different result. Chart engine takes the null value as 0, but in DTE null will be discarded. I have checked the behavior of excel, the null value is discarded in it. Build version:2.2.0v20070619-0630 Steps to reproduce: 1. Get the attached report design file and preview.
chart/org.eclipse.birt.chart.ui.extension/src/org/eclipse/birt/chart/ui/swt/series/DifferenceSeriesAttributeComposite.java
public void widgetSelected( SelectionEvent e )
	{
		if ( e.getSource( ).equals( btnCurve ) )
		{
			( (DifferenceSeries) series ).setCurve( btnCurve.getSelection( ) );
		}
		else if ( e.getSource( ).equals( btnPalette ) )
		{
			( (DifferenceSeries) series ).setPaletteLineColor( btnPalette.getSelection( ) );
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.swt.events.SelectionListener#widgetDefaultSelected(org.eclipse.swt.events.SelectionEvent)
	 */
	public void widgetDefaultSelected( SelectionEvent e )
	{
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.swt.widgets.Listener#handleEvent(org.eclipse.swt.widgets.Event)
	 */
	public void handleEvent( Event event )
	{
		if ( event.widget.equals( liacLine1 ) )
		{
			if ( event.type == LineAttributesComposite.VISIBILITY_CHANGED_EVENT )
			{