echart dataset 和encode做多条折线

Question

\#\#\# 怎么通过dataset结合encode,做多条折线,而不是单条

单条线想改为多条
const chartOptions = {

    dataset: {
      source: 
      {
      Date:[1,2,3,4,5],
      Data:[4,5,6,7,8]
      }
    },
    title: {
      text: " ",
      left: '32',
      top: '3%',
      textStyle: {
        color: '#b5b4b4',
        fontSize: 12
      }
    },
    grid: { top: 20, right: 20, bottom: 40, left: 40},
    xAxis: {
      type: 'category',
      axisTick: {
        alignWithLabel: true
      },
    },
    tooltip: {
      trigger: 'axis',
    },
    yAxis: {
      type: 'value'
    },
    series: [{
      type: 'line',
      //encode 映射上面的Date,Data
      encode: {
        x: 'Date',
        y: 'Data'
      },
    }]
  }

\#\#\# 尝试过解决的方法就是在series里写很多的type:line解决,但是不知有没更简单的方法,求各位大佬棒棒忙

\#\#\# 相关代码

    dataset: {
      source: 
      {
        Date:[1,2,3,4,5],
        Data:[4,5,6,7,8]
      }
    },
      encode: {
        x: 'Date',
        y: 'Data'
      },

\#\#\# 代码需要怎么改写,感谢各位大佬,不懂得地方太多,虚心请教