Bug 212370 [Regression] Negative value can not be shown both in chart builder and when preview [13]
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/computation/withaxes/AxisSubUnit.java
}
		else
		{
			if ( !Double.isNaN( dLastMinPosition ) )
			{
				dBaseLocation = dLastMinPosition;
			}
			dBaseLocation += dMargin;
			dLastMinPosition = dBaseLocation;
		}
	}
	
	/**
	 * Gets the last position
	 * 
	 * @param dValue
	 *            value to check the max or min location
	 * @return
	 */
	public final double getLastPosition( double dValue )
	{
		if ( bStackTogether || dValue >= 0 )
		{
			return dLastMaxPosition;
		}
		return dLastMinPosition;
	}
	
}