我想更改DataTable中数据的格式
为了使其更加灵活,而图表仍然与
第一个。
默认:
['Year', 'Sales', 'Expenses'],
['2004', 1000, 400],
['2005', 1170, 460],
['2006', 660, 1120],
['2007', 1030, 540]
一定是:
['Year', '2004', '2005', '2006', '2007'],
['Sales', 1000, 1170, 660, 1030],
['Expenses', 400 ,460, 1120, 540]
Demo
HTML:
<div id="chart_div" style="width: 450px; height: 300px;"></div>
Javascript:
google.load("visualization", "1", {packages:["corechart"]});
google.setOnLoadCallback(drawChart);
function drawChart() {
var data = google.visualization.arrayToDataTable([
['Year', 'Sales', 'Expenses'],
['2004', 1000, 400],
['2005', 1170, 460],
['2006', 660, 1120],
['2007', 1030, 540]
]);
var options = {
title: 'Company Performance'
};
var chart = new google.visualization.LineChart(document.getElementById('chart_div'));
chart.draw(data, options);
}
最佳答案
您必须像这样转置数组:http://jsfiddle.net/krzysztof_safjanowski/Mw398/1/
var data = google.visualization.arrayToDataTable(transposeArray([
['Year', '2004', '2005', '2006', '2007'],
['Sales', 1000, 1170, 660, 1030],
['Expenses', 400, 460, 1120, 540]
]));
function transposeArray(array) {
return array[0].map(function (col, i) {
return array.map(function (row) {
return row[i];
});
});
}
在将数据传递到
arrayToDataTable
之前,您需要先准备好Google图表可以理解的格式。转置– http://en.wikipedia.org/wiki/Transpose
方法
map
– https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map