Bug 312761 It makes no difference changing the series labels position in Radar chart.[13]
chart/org.eclipse.birt.chart.ui/src/org/eclipse/birt/chart/ui/util/ChartUIUtil.java
* @since 2.3
	 */
	public static void setSeriesName( Chart chart )
	{
		List<SeriesDefinition> seriesDefinitions = getAllOrthogonalSeriesDefinitions( chart );
		String seriesText = Messages.getString( "ChartUIUtil.SeriesLabel" ); 
		SeriesDefinition sd;
		for ( int i = 0; i < seriesDefinitions.size( ); i++ )
		{
			sd = seriesDefinitions.get( i );
			if ( needSeriesName( sd.getDesignTimeSeries( )
					.getSeriesIdentifier( )
					.toString( ), seriesText ) )
			{
				sd.getDesignTimeSeries( )
						.setSeriesIdentifier( MessageFormat.format( seriesText,
								new Object[]{
									Integer.valueOf( i + 1 )
								} ) );
			}
		}
	}
	private static boolean needSeriesName( String name, String seriesText )
	{
		String pattern = MessageFormat.format( seriesText, new Object[]{
			"[0-9]+"} ); 
		return name.trim( ).matches( pattern ) || name.trim( ).length( ) == 0;
	}
	/**
	 * Removes the last orthogonal axes. This is a batch operation.