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我想將列標題添加到圖線中的圖例,它們應該是數據表格中的第一行。如果我刪除標題,圖表工作正常,但是當我嘗試使用標題加載時,我什麼都沒有。下面是基於google api示例創建輸入表的代碼輸出,它看起來是正確的。由於將圖例添加到Google圖表
['Date','Species A', 'Species B'],['2013-08-27',3,1], ['2013-09-17',4,1], ['2013-08-23',1,1], ['2013-08-10',2,8]
代碼的相關位
$result = mysqli_query($con,"SELECT * FROM Species");
while($row1 = mysqli_fetch_array($result))
{
$data1[]= "['" . $row1['Date'] . "'," . $row1['SpeciesA'] . "," . $row1['SpeciesB'] . "]";
}
$headings = "['Date','Species A', 'Species B'],";
$headingdata = $headings . implode(",\n",$data1);
echo $headingdata;
?>
<html>
<head>
<script type="text/javascript" src="https://www.google.com/jsapi"></script>
<script type="text/javascript">
google.load("visualization", "1", {packages:["corechart"]});
google.setOnLoadCallback(drawChart);
function drawChart()
{
// Create the data table.
var data = new google.visualization.DataTable();
data.addColumn('string', 'Date');
data.addColumn('number', 'Species A');
data.addColumn('number', 'Species B');
data.addRows([
<?php echo $headingdata;?>
]);