您可以在“绘制”显示总计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
您可以在末尾添加一行，如下所示：
addRow('Total', getSum(data, 1));
如果问题是如何获得由滑块等过滤的列的总和，那么这是一个不同的野兽，并且是asgallant 的这个 jsfiddle http://jsfiddle.net/asgallant/rEhUp/可能更适合：
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){}
}
