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自定义线条

Overview
更改颜色
更改厚度
虚线

概览

某些 Google 图表（例如面积图、折线图和组合图表）以线条连接数据点。您可以使用本页介绍的技巧自定义线条的颜色、粗细和虚线。

更改颜色

您可以通过两种细微不同的方式更改 Google 图表中连接数据点的线条的颜色：使用 colors 选项更改图表调色板，或使用 series 选项指定特定系列的颜色。

在下面的图表中，我们明确设置了每个系列的颜色。

选项

        var options = {
          legend: 'none',
          series: {
            0: { color: '#e2431e' },
            1: { color: '#e7711b' },
            2: { color: '#f1ca3a' },
            3: { color: '#6f9654' },
            4: { color: '#1c91c0' },
            5: { color: '#43459d' },
          }
        };

完整 HTML

<html>
  <head>
    <script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
    <script type="text/javascript">
      google.charts.load("current", {packages:["corechart"]});
      google.charts.setOnLoadCallback(drawChart);
      function drawChart() {
        var data = google.visualization.arrayToDataTable
            ([['X', '1', '2', '3', '4', '5', '6'],
              [1, 2, 3, 4, 5, 6, 7],
              [2, 3, 4, 5, 6, 7, 8],
              [3, 4, 5, 6, 7, 8, 9],
              [4, 5, 6, 7, 8, 9, 10],
              [5, 6, 7, 8, 9, 10, 11],
              [6, 7, 8, 9, 10, 11, 12]
        ]);

        var options = {
          legend: 'none',
          series: {
            0: { color: '#e2431e' },
            1: { color: '#e7711b' },
            2: { color: '#f1ca3a' },
            3: { color: '#6f9654' },
            4: { color: '#1c91c0' },
            5: { color: '#43459d' },
          }
        };

        var chart = new google.visualization.LineChart(document.getElementById('chart_div'));
        chart.draw(data, options);
      }
    </script>
  </head>
  <body>
    <div id="chart_div" style="width: 900px; height: 500px;"></div>
  </body>
</html>

上面的颜色以十六进制值（例如'#e2431e' 或 '#f00' 表示饱和红色），但也可以通过英文名称指定。以下示例对此进行了说明，还展示了如何通过使用 colors 选项修正图表调色板（而不是设置单个系列的颜色）来控制颜色。一个区别在于，如果您修正调色板，并且调色板中的颜色系列多于颜色，则系统会重复使用这些颜色：如果调色板由红色和蓝色组成，则该系列一半为红色，另一半为蓝色。

选项

        var options = {
          legend: 'none',
          colors: ['black', 'blue', 'red', 'green', 'yellow', 'gray']
        };

完整 HTML

<html>
  <head>
    <script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
    <script type="text/javascript">
      google.charts.load("current", {packages:["corechart"]});
      google.charts.setOnLoadCallback(drawChart);
      function drawChart() {
        var data = google.visualization.arrayToDataTable
            ([['X', '1', '2', '3', '4', '5', '6'],
              [1, 2, 3, 4, 5, 6, 7],
              [2, 3, 4, 5, 6, 7, 8],
              [3, 4, 5, 6, 7, 8, 9],
              [4, 5, 6, 7, 8, 9, 10],
              [5, 6, 7, 8, 9, 10, 11],
              [6, 7, 8, 9, 10, 11, 12]
        ]);

        var options = {
          legend: 'none',
          colors: ['black', 'blue', 'red', 'green', 'yellow', 'gray']
        };

        var chart = new google.visualization.LineChart(document.getElementById('chart_div'));
        chart.draw(data, options);
      }
    </script>
  </head>
  <body>
    <div id="chart_div" style="width: 900px; height: 500px;"></div>
  </body>
</html>

更改厚度

您可以使用 lineWidth 选项控制线条的粗细：

选项

        var options = {
          legend: 'none',
          hAxis: { maxValue: 7 },
          vAxis: { maxValue: 13 },
          lineWidth: 10,
          colors: ['#e2431e', '#d3362d', '#e7711b',
                   '#e49307', '#e49307', '#b9c246']
        };

完整 HTML

<html>
  <head>
    <script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
    <script type="text/javascript">
      google.charts.load("current", {packages:["corechart"]});
      google.charts.setOnLoadCallback(drawChart);
      function drawChart() {
        var data = google.visualization.arrayToDataTable
            ([['X', '1', '2', '3', '4', '5', '6'],
              [1, 2, 3, 4, 5, 6, 7],
              [2, 3, 4, 5, 6, 7, 8],
              [3, 4, 5, 6, 7, 8, 9],
              [4, 5, 6, 7, 8, 9, 10],
              [5, 6, 7, 8, 9, 10, 11],
              [6, 7, 8, 9, 10, 11, 12]
        ]);

        var options = {
          legend: 'none',
          hAxis: { maxValue: 7 },
          vAxis: { maxValue: 13 },
          lineWidth: 10,
          colors: ['#e2431e', '#d3362d', '#e7711b',
                   '#e49307', '#e49307', '#b9c246']
        };

        var chart = new google.visualization.LineChart(document.getElementById('chart_div'));
        chart.draw(data, options);
      }
    </script>
  </head>
  <body>
    <div id="chart_div" style="width: 900px; height: 500px;"></div>
  </body>
</html>

如需控制序列的线宽，请使用 series 选项：

选项

        var options = {
          legend: 'none',
          hAxis: { maxValue: 7 },
          vAxis: { maxValue: 13 },
          series: {
            0: { lineWidth: 1 },
            1: { lineWidth: 2 },
            2: { lineWidth: 4 },
            3: { lineWidth: 8 },
            4: { lineWidth: 16 },
            5: { lineWidth: 24 }
          },
          colors: ['#e2431e', '#d3362d', '#e7711b',
                   '#e49307', '#e49307', '#b9c246']
        };

完整 HTML

<html>
  <head>
    <script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
    <script type="text/javascript">
      google.charts.load("current", {packages:["corechart"]});
      google.charts.setOnLoadCallback(drawChart);
      function drawChart() {
        var data = google.visualization.arrayToDataTable
            ([['X', '1', '2', '3', '4', '5', '6'],
              [1, 2, 3, 4, 5, 6, 7],
              [2, 3, 4, 5, 6, 7, 8],
              [3, 4, 5, 6, 7, 8, 9],
              [4, 5, 6, 7, 8, 9, 10],
              [5, 6, 7, 8, 9, 10, 11],
              [6, 7, 8, 9, 10, 11, 12]
        ]);

        var options = {
          legend: 'none',
          hAxis: { maxValue: 7 },
          vAxis: { maxValue: 13 },
          series: {
            0: { lineWidth: 1 },
            1: { lineWidth: 2 },
            2: { lineWidth: 4 },
            3: { lineWidth: 8 },
            4: { lineWidth: 16 },
            5: { lineWidth: 24 }
          },
          colors: ['#e2431e', '#d3362d', '#e7711b',
                   '#e49307', '#e49307', '#b9c246']
        };

        var chart = new google.visualization.LineChart(document.getElementById('chart_div'));
        chart.draw(data, options);
      }
    </script>
  </head>
  <body>
    <div id="chart_div" style="width: 900px; height: 500px;"></div>
  </body>
</html>

虚线

通过接受数字数组的 lineDashStyle 选项，可以采用多种虚线样式。第一个数字表示短划线的长度，第二个数字表示短划线的长度。如果有第三个数字，则是下一个短划线的长度；第四个数字（如果存在）是下一个间隔的长度。

在绘制图表时，这些长度会重复，因此 [4, 4] 表示一系列 4 个长度的短划线和 4 个长度的间隙。[5, 1, 3] 表示 5 长度的短划线、1 长度的间隔、3 长度的短划线、5 长度的间隔等。部分示例：

选项

        var options = {
          hAxis: { maxValue: 10 },
          vAxis: { maxValue: 18 },
          chartArea: { width: 380 },
          lineWidth: 4,
          series: {
            0: { lineDashStyle: [1, 1] },
            1: { lineDashStyle: [2, 2] },
            2: { lineDashStyle: [4, 4] },
            3: { lineDashStyle: [5, 1, 3] },
            4: { lineDashStyle: [4, 1] },
            5: { lineDashStyle: [10, 2] },
            6: { lineDashStyle: [14, 2, 7, 2] },
            7: { lineDashStyle: [14, 2, 2, 7] },
            8: { lineDashStyle: [2, 2, 20, 2, 20, 2] }
          },
          colors: ['#e2431e', '#f1ca3a', '#6f9654', '#1c91c0',
                   '#4374e0', '#5c3292', '#572a1a', '#999999', '#1a1a1a'],
        };

完整 HTML

<html>
  <head>
    <script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
    <script type="text/javascript">
      google.charts.load("current", {packages:["corechart"]});
      google.charts.setOnLoadCallback(drawChart);
      function drawChart() {
        var data = google.visualization.arrayToDataTable
            ([['X', 'lineDashStyle: [1, 1]', 'lineDashStyle: [2, 2]',
               'lineDashStyle: [4, 4]', 'lineDashStyle: [5, 1, 3]',
               'lineDashStyle: [4, 1]',
               'lineDashStyle: [10, 2]', 'lineDashStyle: [14, 2, 7, 2]',
               'lineDashStyle: [14, 2, 2, 7]',
               'lineDashStyle: [2, 2, 20, 2, 20, 2]'],
              [1, 2, 3, 4, 5, 6, 7, 8, 9, 10],
              [2, 3, 4, 5, 6, 7, 8, 9, 10, 11],
              [3, 4, 5, 6, 7, 8, 9, 10, 11, 12],
              [4, 5, 6, 7, 8, 9, 10, 11, 12, 13],
              [5, 6, 7, 8, 9, 10, 11, 12, 13, 14],
              [6, 7, 8, 9, 10, 11, 12, 13, 14, 15],
              [7, 8, 9, 10, 11, 12, 13, 14, 15, 16],
              [8, 9, 10, 11, 12, 13, 14, 15, 16, 17],
              [9, 10, 11, 12, 13, 14, 15, 16, 17, 18]
        ]);

        var options = {
          hAxis: { maxValue: 10 },
          vAxis: { maxValue: 18 },
          chartArea: { width: 380 },
          lineWidth: 4,
          series: {
            0: { lineDashStyle: [1, 1] },
            1: { lineDashStyle: [2, 2] },
            2: { lineDashStyle: [4, 4] },
            3: { lineDashStyle: [5, 1, 3] },
            4: { lineDashStyle: [4, 1] },
            5: { lineDashStyle: [10, 2] },
            6: { lineDashStyle: [14, 2, 7, 2] },
            7: { lineDashStyle: [14, 2, 2, 7] },
            8: { lineDashStyle: [2, 2, 20, 2, 20, 2] }
          },
          colors: ['#e2431e', '#f1ca3a', '#6f9654', '#1c91c0',
                   '#4374e0', '#5c3292', '#572a1a', '#999999', '#1a1a1a'],
        };

        var chart = new google.visualization.LineChart(document.getElementById('chart_div'));
        chart.draw(data, options);
      }
    </script>
  </head>
  <body>
    <div id="chart_div" style="width: 900px; height: 500px;"></div>
  </body>
</html>