val = Math.random() * 1000;
                    xAxisData.push('category' + i);
                    var customVal = [i];
                    customData.push(customVal);

                    var data = dataList[0];
                    for (var j = 0; j < dataList.length; j++) {
                        var value = j === 0
                            ? echarts.number.round(val, 2)
                            : echarts.number.round(Math.max(0, dataList[j - 1][i] + (Math.random() - 0.5) * 200), 2);
             