我制作了一个图表，显示机器以及修复它们所需的时间(机器 X，时间 Y) 数据通过 mysql 动态加载，如下所示
<?php
include_once(“connexion.php”);
ini_set(‘max_execution_time’,300);
//ini_set(‘error_reporting’, E_ALL);
$sq = “select machine,date_tech,time(time_fin – time_deb) as diff from action_archiv_tech WHERE (date_tech BETWEEN ‘2018-09-10’ AND ‘2018-10-06’)”;
$r = mysql_query($sq) or (die(mysql_error()));
while($tab = mysql_fetch_assoc($r)) {
$machine = $tab[‘machine’];
$diff = $tab[‘diff’];
// $data[] = [“label”=>$machine, “y”=>$diff];
$data[] = array(
‘label’ => $tab[‘machine’],
‘y’ => $tab[‘diff’]
);
}
?>
<!DOCTYPE HTML>
<html>
<head>
<meta charset=”UTF-8”>
<script>
window.onload = function () {
var chart = new CanvasJS.Chart(“chartContainer”, {
theme:”light2″,
animationEnabled: true,
title:{
text: “PM”
},
axisY :{
includeZero: false,
title: “Heures”,
suffix: “H”
},
toolTip: {
shared: “true”
},
legend:{
cursor:”pointer”,
itemclick : toggleDataSeries
},
data: [
{
type: “spline”,
showInLegend: true,
yValueFormatString: “##.00H”,
name: “Curative”,
dataPoints: <?php echo json_encode($data); ?>
}
]
});
chart.render();
function toggleDataSeries(e) {
if (typeof(e.dataSeries.visible) === “undefined” || e.dataSeries.visible ){
e.dataSeries.visible = false;
} else {
e.dataSeries.visible = true;
}
chart.render();
}
}
</script>
</head>
<body>
<div id=”chartContainer” style=”height: 370px; max-width: 1920px; margin: 0px auto;”></div>
<script src=”../../canvasjs.min.js”></script>
</body>
</html>
但是结果并不像预期
你能帮我弄清楚如何解决这个问题吗:)
最佳答案
看起来您正在 y 值中传递日期时间，而 CanvasJS 仅支持 axisY 中的数字。请引用documentation了解更多信息。但是，您可以通过将 -values 作为时间戳传递并格式化轴标签和工具提示中的值来解决此问题，如下例所示，这里是 JSFiddle对于同样的。
var chart = new CanvasJS.Chart("chartContainer", {
title: {
text: "Machine Operating Time"
},
axisY: {
minimum: (new Date(2016, 0, 25, 17, 30)).getTime(),
interval: (12 * 60 * 60 * 1000),
labelFormatter: function(e){
return CanvasJS.formatDate(e.value, "DD-MMM h:mm TT");
}
},
toolTip:{
contentFormatter: function ( e ) {
return "<strong>Machine " + e.entries[0].dataPoint.label + "</strong></br> Start Time: " + CanvasJS.formatDate(e.entries[0].dataPoint.y[0], "DD-MMM h:mm TT") + "</br> Stop Time: " + CanvasJS.formatDate(e.entries[0].dataPoint.y[1], "DD-MMM h:mm TT");
}},
data: [{
type: "rangeColumn",
dataPoints: [
{ label: "A", y: [(new Date(2016, 0, 25, 18, 30)).getTime(), (new Date(2016, 0, 26, 11, 00)).getTime()] }, //.getTime() returns timestamp => y-value is numeric
{ label: "B", y: [(new Date(2016, 0, 26, 12, 00)).getTime(), (new Date(2016, 0, 27, 14, 00)).getTime()] },
{ label: "C", y: [(new Date(2016, 0, 27, 3, 30)).getTime(), (new Date(2016, 0, 27, 14, 00)).getTime()] },
{ label: "D", y: [(new Date(2016, 0, 27, 12, 00)).getTime(), (new Date(2016, 0, 28, 14, 00)).getTime()] }
]
}]
});
chart.render();<script src="http://canvasjs.com/assets/script/canvasjs.min.js"></script>
<div id="chartContainer" style="height: 260px; width: 100%;"></div>关于javascript - 使用 CanvasJS 在图表中显示 Y 轴，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/52684236/