public void setBubbleRange( String bubbleSizes )
	{
		if( (bubbleSizes != null) && !bubbleSizes.equals( "" ) )
		{
			myseries.getParentChart().setMetricsDirty();
			Ai ai = myseries.getBubbleValueAi();
			if( ai.getWorkBook() == null )
			{
				ai.setWorkBook( wbh.getWorkBook() );
			}
			ai.changeAiLocation( ai.toString(), bubbleSizes );
			ai.setRt( 2 );
			try
			{    // also update Bubble Count for this series
				int[] coords = ExcelTools.getRangeCoords( bubbleSizes );
				myseries.setBubbleCount( coords[4] );
				myseries.getParentChart().setMetricsDirty();
			}
			catch( Exception e )
			{

			}
		}
	}