...
//对象：ClientSide 事件：beforeRenderer
function main(chartView) {
var chart = chartView.getChartObject();//获取echarts图形
var options = chart.getOptions();
var title = options.title.text; //获取图形标题
var parm = options.chartdata.paramsData[0].value; //获取参数
options.title.text = parm;
}
注：图形需要勾选标题
