我有一个 ScatterChart，我需要在其中绘制一条(函数 y=x 的)对 Angular 线，作为视觉辅助。可能吗 ？如果是这样，我该怎么做？

请您参考如下方法:

另一种解决方案是您可以使用 Scatter多系列图表，并设置lineWidth = 1和 pointSize = 0对于 Line图表!

请参见以下示例:

function main() { 
  const xMin = -2 * Math.PI; 
  const xMax = 2 * Math.PI; 
  const f1 = x => Math.cos(x) + Math.random(); 
  const f2 = x => Math.cos(x); 
 
  const x = linspace(xMin, xMax, 20); 
  const y1 = x.map(f1); 
  const y2 = x.map(f2); 
 
  scatterLineChart(document.getElementById('scatter-line-chart'), x, [y1, y2], 'Scatter: Cos(x) + Noise, Line: Cos(x)', 'x', ['Cos(x) + Noise', 'Cos(x)']); 
} 
 
function linspace(a, b, n = 100) { 
  const data = new Array(n); 
 
  const d = (b - a) / (n - 1); 
 
  data[0] = a; 
  data[n - 1] = b; 
 
  n = n - 1; 
  for (let i = 1; i < n; i++) { 
    data[i] = data[i - 1] + d; 
  } 
 
  return data; 
} 
 
function createSeriesDataTable(x, ys, xLabel, yLabels) { 
  // data 
  const data = new google.visualization.DataTable(); 
 
  // - columns 
  data.addColumn('number', xLabel); 
  yLabels.forEach(yLabel => { 
    data.addColumn('number', yLabel); 
  }); 
 
  // - rows 
  const n = x.length; 
  const m = ys.length; 
  const rows = Array(n); 
  for (let i = 0; i < n; i++) { 
    rows[i] = Array(1 + m); 
    rows[i][0] = x[i]; 
    for (let j = 0; j < m; j++) { 
      rows[i][j + 1] = ys[j][i]; 
    } 
  } 
  data.addRows(rows); 
 
  // return 
  return data; 
} 
 
function scatterLineChart(parentElement, x, ys, title, xLabel, yLabels) { 
  google.charts.load('current', { 
    'packages': ['corechart'] 
  }); 
  google.charts.setOnLoadCallback(drawChart); 
 
  function drawChart() { 
    const data = createSeriesDataTable(x, ys, xLabel, yLabels); 
    const options = { 
      title: title, 
      series: { 
        1: { 
          lineWidth: 3, 
          pointSize: 0, 
          curveType: 'function' 
        }, 
      }, 
      legend: 'none' 
 
    }; 
 
    const chart = new google.visualization.ScatterChart(parentElement); 
    chart.draw(data, options); 
  } 
} 
 
main();

<script src="https://www.gstatic.com/charts/loader.js"></script> 
<div id="scatter-line-chart"></div>