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我們使用AmCharts的股票圖表與多個DataSet通過ajax異步加載。AmCharts股票圖表多個數據集的日期範圍是不正確
不幸的是，它看起來像整個圖表的日期範圍，我的意思是「From」和「To」僅從第一個添加到所有DataSet數組中設置。
試想一下，你有3個數據集的情況和他們每個人都可以有開始和結束日期完全不同：
<script id="data-set-1" type="application/json">
[
{"date": "2016-10-02T10:00:00", "value": 23.8},
{"date": "2016-10-02T10:05:00", "value": 16.8},
{"date": "2016-10-02T10:10:00", "value": 20.5}
]
</script>
<!-- This dataset has max end date from all 3 datasets -->
<script id="data-set-2" type="application/json">
[
{"date": "2016-10-02T10:00:00", "value": 15.2},
{"date": "2016-10-02T10:05:00", "value": 21.4},
{"date": "2016-10-02T10:15:00", "value": 18.1}
]
</script>
<!-- This dataset has min start date from all 3 datasets -->
<script id="data-set-3" type="application/json">
[
{"date": "2016-10-02T09:55:00", "value": 12.4},
{"date": "2016-10-02T10:00:00", "value": 17.7},
{"date": "2016-10-02T10:05:00", "value": 14.6}
]
</script>
在上面的例子中可以看出，數據集-2具有從所有3最大結束日期DataSets和data-set-3在所有3個數據集中都有最小開始日期。
最終結果是：
<!DOCTYPE html>
<html>
<head>
<title>AmCharts multiple datasets min-max date range issue</title>
<meta charset="utf-8" />
<style type="text/css">
#chartdiv {
width: 100%;
height: 500px;
}
</style>
<script id="data-set-1" type="application/json">
[
{"date": "2016-10-02T10:00:00", "value": 23.8},
{"date": "2016-10-02T10:05:00", "value": 16.8},
{"date": "2016-10-02T10:10:00", "value": 20.5}
]
</script>
<!-- This dataset has max end date from all 3 datasets -->
<script id="data-set-2" type="application/json">
[
{"date": "2016-10-02T10:00:00", "value": 15.2},
{"date": "2016-10-02T10:05:00", "value": 21.4},
{"date": "2016-10-02T10:15:00", "value": 18.1}
]
</script>
<!-- This dataset has min start date from all 3 datasets -->
<script id="data-set-3" type="application/json">
[
{"date": "2016-10-02T09:55:00", "value": 12.4},
{"date": "2016-10-02T10:00:00", "value": 17.7},
{"date": "2016-10-02T10:05:00", "value": 14.6}
]
</script>
<link rel="stylesheet" href="https://www.amcharts.com/lib/3/plugins/export/export.css" type="text/css" media="all" />
</head>
<body>
<div id="chartdiv"></div>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.1/jquery.min.js"></script>
<script src="https://www.amcharts.com/lib/3/amcharts.js"></script>
<script src="https://www.amcharts.com/lib/3/serial.js"></script>
<script src="https://www.amcharts.com/lib/3/amstock.js"></script>
<script src="https://www.amcharts.com/lib/3/plugins/export/export.min.js"></script>
<script type="text/javascript">
$(document).ready(function() {
AmCharts.useUTC = true; // this will prevent adding timezone hours to ech date
var chart = AmCharts.makeChart("chartdiv", {
"pathToImages": "http://cdn.amcharts.com/lib/3/images/",
"type": "stock",
"theme": "light",
"categoryAxesSettings": {
"minPeriod": "mm" // precision to minutes
},
"dataSets": [], // empty, we will add each based on single sensor
"panels": [{
"recalculateToPercents": "never", // show value on scale not percent
"showCategoryAxis": true,
"title": "",
"percentHeight": 70,
"stockGraphs": [{ // generic config for all lines
"id": "g1",
"connect": true, // show gaps in data
"comparable": true, // must be true to disable/enable each dataset
"compareField": "value",
"valueField": "value",
"type": "smoothedLine",
"lineThickness": 2,
"bullet": "round"
}],
"stockLegend": {
"periodValueTextRegular": "[[value.close]]" // what will be shown at top legend
}
}],
"chartScrollbarSettings": {
"graph": "g1",
"usePeriod": "10mm",
"position": "top"
},
"chartCursorSettings": {
"valueBalloonsEnabled": true
},
"periodSelector": {
"fromText": "",
"toText": "",
"periodsText": "",
"position": "top",
"dateFormat": "YYYY-MM-DD JJ:NN",
"inputFieldWidth": 150,
"periods": [{
"period": "hh",
"count": 1,
"label": "1 H",
"selected": true
}, {
"period": "hh",
"count": 8,
"label": "8 H"
}, {
"period": "DD",
"count": 1,
"label": "1 D"
}, {
"period": "DD",
"count": 10,
"label": "10 D"
}, {
"period": "MM",
"selected": true,
"count": 1,
"label": "1 M"
}, {
"period": "YYYY",
"count": 1,
"label": "1 Y"
}, {
"period": "YTD",
"label": "YTD"
}, {
"period": "MAX",
"label": "MAX"
}]
},
"panelsSettings": {
"usePrefixes": true
},
"export": {
"enabled": true,
"exportTitles": true,
"libs": {
"path": "http://www.amcharts.com/lib/3/plugins/export/libs/"
},
"position": "bottom-right"
}
});
for (var i = 1; i <= 3; i++) {
var dataset = new AmCharts.DataSet();
dataset.compared = true;
dataset.title = "DataSet " + i;
dataset.categoryField = "date";
dataset.fieldMappings = JSON.parse('[{"fromField": "value", "toField": "value"}]');
var data = JSON.parse($("#data-set-" + i).html());
dataset.dataProvider = data;
chart.dataSets.push(dataset);
chart.validateData();
}
});
</script>
</body>
</html>可以看到，整個圖表被截斷爲時間範圍從數據集-1，圖未示出的日期 - 組 - 2點：
{"date": "2016-10-02T10:15:00", "value": 18.1}
，也沒有顯示日期設定3點：
{"date": "2016-10-02T09:55:00", "value": 12.4}
我試圖破解「從」和「到」的投入沒有任何的運氣：
chart.addListener("init",
function (e) {
//e.chart.startDate = moment("2016-10-01 00:00");
//e.chart.endDate = moment("2016-10-03 00:00");
});
任何想法如何，不僅從第一強制圖表來查找從所有數據集的最小和最大的日期，一個添加到數據集的數組？
當我們有很多數據時性能又如何？ –
我想對於數百或數千個數據點，額外的處理開銷不應有任何明顯的差異。數十或數十萬可能需要更長的時間。但很難估計確切的數字，只需要用您的實際數據來嘗試。 – martynasma
現在還不夠好。我們將在我們的大型創業公司中使用它後，我會更新我的問題或添加其他答案。謝謝。 –