Question

我有一个简单的Google可视化仪表板示例，其中包含一个categorypicker控件和一个表。我的代码如下。

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
  <head>
    <meta http-equiv="content-type" content="text/html; charset=utf-8"/>
    <script type="text/javascript" src="http://www.google.com/jsapi"></script>
    <script type="text/javascript">
      google.load('visualization', '1.1', {packages: ['controls']});
    </script>
    <script type="text/javascript">
      function drawVisualization() {
        // Prepare the data.
        var data = google.visualization.arrayToDataTable([
          ['Metric', 'Value'],
          ['CPU' , 12],
          ['Memory', 20],
          ['Disk', 7],
          ['Network', 54]
        ]);

        // Define a category picker for the 'Metric' column.
        var categoryPicker = new google.visualization.ControlWrapper({
          'controlType': 'CategoryFilter',
          'containerId': 'control',
          'options': {
            'filterColumnLabel': 'Metric',
            'ui': {
              'allowTyping': false,
              'allowMultiple': true,
              'selectedValuesLayout': 'belowStacked'
            }
          },

        });

        // Define a table.
        var table = new google.visualization.ChartWrapper({
          'chartType': 'Table',
          'containerId': 'chart',
          'options': {
            'width': 400,
            'height': 180
          }
        });

        // Create the dashboard.
        var dashboard = new google.visualization.Dashboard(document.getElementById('dashboard')).
          // Configure the category picker to affect the table
          bind(categoryPicker, table).
          // Draw the dashboard
          draw(data);
      }

      google.setOnLoadCallback(drawVisualization);
    </script>
  </head>
  <body style="font-family: Arial;border: 0 none;">
    <div id="dashboard">
      <table>
        <tr style='vertical-align: top'>
          <td style='width: 300px; font-size: 0.9em;'>
            <div id="control"></div>
          </td>
          <td style='width: 600px'>
            <div style="float: left;" id="chart"></div>
          </td>
        </tr>
      </table>
    </div>
  </body>
</html>

我遇到了一个问题，我想要最后的总值。如何在表的末尾再添加一行，以便显示第二列中所有值的总计。即，最初它应该显示所有四行的总和，当应用过滤器时，它应该显示过滤行值的总和。

Answer 1

您可以在“绘制”显示总数的图表之前添加一行：

例如：

  var data = google.visualization.arrayToDataTable([
    ['Year', 'Austria', 'Belgium', 'Czech Republic', 'Finland', 'France', 'Germany'],
    ['2003',  1336060,   3817614,       974066,       1104797,   6651824,  15727003],
    ['2004',  1538156,   3968305,       928875,       1151983,   5940129,  17356071],
    ['2005',  1576579,   4063225,       1063414,      1156441,   5714009,  16716049],
    ['2006',  1600652,   4604684,       940478,       1167979,   6190532,  18542843],
    ['2007',  1968113,   4013653,       1037079,      1207029,   6420270,  19564053],
    ['2008',  1901067,   6792087,       1037327,      1284795,   6240921,  19830493]
  ]);

  function getSum(data, column) {
    var total = 0;
    for (i = 0; i < data.getNumberOfRows(); i++)
      total = total + data.getValue(i, column);
    return total;
  }

  alert(getSum(data, 1));

这会给你一个很好的警告框，上面写着9920627

1336060+1538156+1576579+1600652+1968113+1901067=9920627

你可以在最后添加一行代码：

addRow('Total', getSum(data, 1));

如果问题是关于如何获得已被滑块等过滤的列的总和，那就是一个不同的野兽，以及this jsfiddle by asgallant可能更适合的那些：

google.load('visualization', '1.1', {packages: ['controls']});
google.setOnLoadCallback(drawVisualization);

function drawVisualization() {
    // Prepare the data
    var data = google.visualization.arrayToDataTable([
        ['Name', 'RoolNumber', 'Gender', 'Age', 'Donuts eaten'],
        ['Michael', 1, 'Male', 12, 5],
        ['Elisa', 2, 'Female', 20, 7],
        ['Robert', 3, 'Male', 7, 3],
        ['John', 4, 'Male', 54, 2],
        ['Jessica', 5, 'Female', 22, 6],
        ['Aaron', 6, 'Male', 3, 1],
        ['Margareth', 7, 'Female', 42, 8],
        ['Miranda', 8, 'Female', 33, 6]
    ]);

    // Define a slider control for the Age column.
    var slider_rn = new google.visualization.ControlWrapper({
        controlType: 'NumberRangeFilter',
        containerId: 'control2',
        options: {
            filterColumnLabel: 'RoolNumber',
            ui: {
                labelStacking: 'vertical'
            }
        }
    });

    var slider = new google.visualization.ControlWrapper({
        controlType: 'NumberRangeFilter',
        containerId: 'control1',
        state: {
            lowValue: 10,
            highValue: 40,
            highThumbAtMax: true
        },
        options: {
            filterColumnLabel: 'Age',
            ui: {
                labelStacking: 'vertical'
            }
        }
    });

    // Define a category picker control for the Gender column
    var categoryPicker = new google.visualization.ControlWrapper({
        controlType: 'CategoryFilter',
        containerId: 'control3',
        options: {
            filterColumnLabel: 'Gender',
            ui: {
                labelStacking: 'vertical',
                allowTyping: false,
                allowMultiple: false
            }
        }
    });

    // Define a Pie chart
    var pie = new google.visualization.ChartWrapper({
        chartType: 'PieChart',
        containerId: 'chart1',
        options: {
            width: 300,
            height: 300,
            legend: 'none',
            title: 'Donuts eaten per person',
            chartArea: {
                left: 15,
                top: 15,
                right: 0,
                bottom: 0
            },
            pieSliceText: 'label'
        },
        // Instruct the piechart to use colums 0 (Name) and 3 (Donuts Eaten)
        // from the 'data' DataTable.
        view: {
            columns: [0, 4]
        }
    });

    // Define a table
    var table = new google.visualization.ChartWrapper({
        chartType: 'Table',
        containerId: 'chart2',
        options: {
            width: '500px'
        }
    });

    // get average and geometric mean values
    google.visualization.events.addListener(table, 'ready', function () {
        var group = google.visualization.data.group(table.getDataTable(), [{
            // we need a key column to group on, but since we want all rows grouped into 1, 
            // then it needs a constant value
            column: 0,
            type: 'number',
            modifier: function () {
                return 1;
            }
        }], [{
            // get the average age
            column: 3,
            label: 'Average Age',
            type: 'number',
            aggregation: google.visualization.data.avg
        }, {
            // get the geometric mean of age
            column: 3,
            label: 'Geometric Mean of Age',
            type: 'number',
            aggregation: function (values) {
                var product = 1;
                var n = values.length;
                for (i = 0; i < n; i++) {
                    product = product * values[i];
                }
                return nthroot(product, n);
            }
        }]);
        document.getElementById('avg').innerHTML = group.getValue(0, 1);
        document.getElementById('geomean').innerHTML = group.getValue(0, 2);
    });

    // Create a dashboard
    new google.visualization.Dashboard(document.getElementById('dashboard')).
    // Establish bindings, declaring the both the slider and the category
    // picker will drive both charts.
    bind([slider, slider_rn, categoryPicker], [table, pie]).
    // Draw the entire dashboard.
    draw(data);
}

// nthroot function courtesy of http://gotochriswest.com
// see http://gotochriswest.com/blog/2011/05/06/cube-root-an-beyond/
// special function necessary because Math.pow(-8, 1/3) returns NaN instead of -2
function nthroot(x, n) {
    try {
        var negate = n % 2 == 1 && x < 0;
        if (negate) {
            x = -x;
        }
        var possible = Math.pow(x, 1 / n);
        n = Math.pow(possible, n);
        if (Math.abs(x - n) < 1 && (x > 0 == n > 0)) {
            return negate ? -possible : possible;
        }
    } catch(e){}
}

Google可视化信息中心表格中的Grand Total

1 个答案: