public GraphPanel(int updatePeriod)
{
this.setPreferredSize(new Dimension(400,300));
/** Create graph bean **/
_graphingBean = new XYGraphingBean();
_graphingBean.setXAxisLabel("Sample");
_graphingBean.setYAxisLabel("Value");
/** Create initial graph image **/
_graphImage = _graphingBean.createGraphImage(400,300);