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我正試圖用谷歌圖表的幫助生成一個線圖。但是,我看到「表格沒有列」。我試着在谷歌網站上給出的例子,並觀察相同。以下是我的代碼:Google圖表在所有情況下都會打印「表格沒有列」?
<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 jsonDataString = "{\"cols:\":{\"Time\":\"\",\"Sensor-1\":\"\",\"Sensor-2\":\"\",\"Sensor-3\":\"\",\"Sensor-4\":\"\"},\"rows\":[{\"1\":[{\"Sensor-1\":1024,\"Sensor-2\":1024,\"Sensor-3\":1024,\"Sensor-4\":1024}]},{\"2\":[{\"Sensor-1\":1024,\"Sensor-2\":1024,\"Sensor-3\":1024,\"Sensor-4\":1024}]},{\"3\":[{\"Sensor-1\":1024,\"Sensor-2\":1024,\"Sensor-3\":1024,\"Sensor-4\":1024}]},{\"4\":[{\"Sensor-1\":1024,\"Sensor-2\":1024,\"Sensor-3\":1024,\"Sensor-4\":1024}]},{\"5\":[{\"Sensor-1\":1024,\"Sensor-2\":1024,\"Sensor-3\":1024,\"Sensor-4\":1024}]},{\"6\":[{\"Sensor-1\":1024,\"Sensor-2\":1024,\"Sensor-3\":1024,\"Sensor-4\":1024}]},{\"7\":[{\"Sensor-1\":1024,\"Sensor-2\":1024,\"Sensor-3\":1024,\"Sensor-4\":1024}]},{\"8\":[{\"Sensor-1\":1024,\"Sensor-2\":1024,\"Sensor-3\":1024,\"Sensor-4\":1024}]},{\"9\":[{\"Sensor-1\":1024,\"Sensor-2\":1024,\"Sensor-3\":1024,\"Sensor-4\":1024}]},{\"10\":[{\"Sensor-1\":1024,\"Sensor-2\":1024,\"Sensor-3\":1024,\"Sensor-4\":1024}]}]}";
var jsonData = JSON.parse(jsonDataString);
console.log(jsonData);
var data = new google.visualization.DataTable(jsonData);
var options = {
title: 'time - temp',
curveType: 'function',
legend: { position: 'bottom' }
};
var chart = new google.visualization.LineChart(document.getElementById('curve_chart'));
chart.draw(data, options);
}
</script>
</head>
<body>
<div id="curve_chart" style="width: 900px; height: 500px"></div>
</body>
</html>
任何想法,我哪裏會出錯? 謝謝。
該文件還沒有準備好。檢查出接受的答案http://stackoverflow.com/questions/556406/google-setonloadcallback-with-jquery-document-ready-is-it-ok-to-mix –
@EricGuan Nopes,不應該是這樣因爲setOnLoadCallback是在文檔準備就緒和google API加載後觸發的。 –