手動で。
この例は、asgallantによるjsfiddleで見ることができます。これは、dataViewを使用してタスクを実行します。
google.load('visualization', '1', {packages: ['table']});
google.setOnLoadCallback(drawChart);
function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('number', 'A');
data.addColumn('string', 'B');
data.addColumn('number', 'C');
data.addRows([
[1, 'foo', 6],
[2, 'foo', 2],
[3, 'foo', 1],
[4, 'foo', 3],
[1, 'bar', 7],
[2, 'bar', 3],
[1, 'baz', 8],
[2, 'baz', 4]
]);
var table1 = new google.visualization.Table(document.getElementById('table1'));
table1.draw(data, {});
/* manually pivot the data table
* set column A as the first column in the view,
* then we have to separate out the C values into their own columns
* according to the value of B, using a DataView with calculated columns
*/
var view = new google.visualization.DataView(data);
view.setColumns([0, {
type: 'number',
label: 'foo',
calc: function (dt, row) {
// return values of C only for the rows where B = "foo"
return (dt.getValue(row, 1) == 'foo') ? dt.getValue(row, 2) : null;
}
}, {
type: 'number',
label: 'bar',
calc: function (dt, row) {
// return values of C only for the rows where B = "bar"
return (dt.getValue(row, 1) == 'bar') ? dt.getValue(row, 2) : null;
}
}, {
type: 'number',
label: 'baz',
calc: function (dt, row) {
// return values of C only for the rows where B = "baz"
return (dt.getValue(row, 1) == 'baz') ? dt.getValue(row, 2) : null;
}
}]);
// next, we group the view on column A, which gets us the pivoted data
var pivotedData = google.visualization.data.group(view, [0], [{
column: 1,
type: 'number',
label: view.getColumnLabel(1),
aggregation: google.visualization.data.sum
}, {
column: 2,
type: 'number',
label: view.getColumnLabel(2),
aggregation: google.visualization.data.sum
}, {
column: 3,
type: 'number',
label: view.getColumnLabel(3),
aggregation: google.visualization.data.sum
}]);
var table2 = new google.visualization.Table(document.getElementById('table2'));
table2.draw(pivotedData, {});
}
または、手動で行うこともできます。
var data = new google.visualization.DataTable();
data.addColumn('string', 'First Column Title');
var baseline = chartData.getValue(chartData.getNumberOfRows() - 1, 15);
for (var i = 0; i < chartData.getNumberOfRows(); i++) {
data.addColumn('number', chartData.getFormattedValue(i, 0));
};
for (var j = 0; j < chartData.getNumberOfColumns() - 2; j++) {
data.addRow();
data.setValue(j, 0, chartData.getColumnLabel(j + 1));
for (var i = 0; i < chartData.getNumberOfRows(); i++) {
data.setValue(j, i + 1, chartData.getValue(i, j+1));
};
};