我正在尝试使用带注释的时间线和 PHP 通过添加角色来绘制两个不同的时间序列 - 第二个时间序列将有自己的日期时间类型和角色域。这是 index.php 文件:
<script type='text/javascript'>
google.load('visualization', '1', {'packages':['annotatedtimeline']});
google.setOnLoadCallback(drawChartSeptTEC);
function drawChartSeptTEC(){
var json = $.ajax({
url: "get_json_forecast.php",
dataType: "json",
async: false
}).responseText;
var data = new google.visualization.DataTable(json);
var chart = new google.visualization.AnnotatedTimeLine(document.getElementById('chart_div'));
chart.draw(data, {displayAnnotations: true});
}
// setInterval(drawChartSeptTEC, 59000 );
</script>
和服务器端:
<?php
$tempcols=array();
$tempcols[] =array('type' => 'datetime','role' => 'domain');
$tempcols[] =array('type' => 'number','role' => 'data','label'=>'polynomial');
$tempcols[] =array('type' => 'number','role' => 'interval');
$tempcols[] =array('type' => 'number','role' => 'interval');
$tempcols[] =array('type' => 'datetime','role' => 'domain');
$tempcols[] =array('type' => 'number','role' => 'data','label'=>'spectral');
$table['cols'] = $tempcols;
$rows = array();
$pg_result = pg_query($link,$query);
pg_close($link);
while ($row = pg_fetch_assoc($pg_result)) {
$temp = array();
$correctDateTime = substr_replace($row['time'], ( substr($row['time'],5,2) -1 ) ,5,2);
$temp[] = array('v' => "Date(".$correctDateTime.")");
$temp[] = array('v' => (float) $row['f2poly']);
$temp[] = array('v' => (float) $row['f2polydev']);
$temp[] = array('v' => (float) $row['f2polydev']);
$temp[] = array('v' => "Date(".$correctDateTime.")");
$temp[] = array('v' => (float) $row['f2spec']);
$rows[] = array('c' => $temp);
}
$table['rows'] = $rows;
$jsonTable = json_encode($table);
header('Cache-Control: no-cache, must-revalidate');
header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
header('Content-type: application/json');
header('Access-Control-Allow-Origin: *');
echo $jsonTable;
?>
控制台错误报告:
错误:每个值列后面可能有一个或两个注释列。第 4 列是日期时间类型。
当我删除第二个域列时,可视化工作。
间隔角色(即误差线)也无法识别。这将问题简化为:我们如何使用 PHP 配置角色?