我正在尝试使用 dc.js 和 crossfilter.js 但我总是得到
"Uncaught TypeError: Cannot read property 'format' of undefined dc.js:484
Uncaught TypeError: Cannot read property '1' of null header.js:3
Uncaught ReferenceError: dc is not defined (index):39 "
我认为加载库的顺序不是问题，但我无法弄清楚格式是什么以及为什么会导致问题!!我什至没有使用外部文件来加载数据 我的index.html
<!DOCTYPE html>
<html>
<head>
<link type="text/css" rel="stylesheet" href="css/dc.css"/>
<link rel="stylesheet" type="text/css" href="css/bootstrap.min.css">
<script type="text/javascript" src="js/crossfilter.js" ></script>
<script type="text/javascript" src="js/d3.js" ></script>
<script type="text/javascript" src="js/dc.js"></script>
</head>
<body>
<div class="container">
<script type="text/javascript" src="js/header.js"></script>
<p>This example demonstrates assigning a threshold dynamically to a pie chart by creating a new dimension based on slider input.</p>
<div id="inputSlider">
<div><input type="range" id="slideRange" value="0.5" min="0" max="1.0" step="0.1" onchange="updateSlider(this.value)"></div>
Score threshold: <span id="sliderValue">0.5</label>
</div>
<div id="dc-coreAcc-piechart"></div>
<div id="dc-score-barchart"></div>
<script type="text/javascript">
var data = [
{ "book": "A", "scores": 45 },
{ "book": "B", "scores": 34 },
{ "book": "C", "scores": 54 },
{ "book": "D", "scores": 27 },
{ "book": "E", "scores": 70 },
{ "book": "F", "scores": 25 },
{ "book": "G", "scores": 92 },
{ "book": "H", "scores": 22 },
{ "book": "I", "scores": 40 },
{ "book": "J", "scores": 10 },
{ "book": "K", "scores": 40 }
];
//## Create Chart Objects
var scoreChart = dc.barChart("#dc-score-barchart")
.xAxisLabel('book_id')
.yAxisLabel('score');
var goodYesNoPieChart = dc.pieChart('#dc-coreAcc-piechart');
//### Create Crossfilter Dimensions and Groups
var ndx = crossfilter(data);
var all = ndx.groupAll();
var bookDimension = ndx.dimension(function (d) {return d.book;}),
bookscoresGroup = bookDimension.group().reduceSum(function(d) {return d.scores;});
//## score bar chart
scoreChart.width(320)
.height(320)
.dimension(bookDimension)
.group(bookscoresGroup)
.elasticY(true)
.x(d3.scale.ordinal())
.xUnits(dc.units.ordinal)
.colors(["orange"])
.yAxis().ticks(5);
//## pie chart
// reusable function to create threshold dimension
function coreCount_from_threshold() {
var scoreThreshold=document.getElementById('slideRange').value;
scoreThreshold=parseFloat(scoreThreshold);
if (isNaN(scoreThreshold)) {
scoreThreshold=0.5
}
return ndx.dimension(function (d) {
var maxNumber=80;
if (d.scores >maxNumber*scoreThreshold) {
return 'High';
} else {
return 'Low';
}
});
}
var coreCount = coreCount_from_threshold();
var coreCountGroup = coreCount.group();
goodYesNoPieChart
.width(320)
.height(320)
.radius(120)
.innerRadius(40)
.dimension(coreCount)
.title(function(d){return d.value;})
.group(coreCountGroup)
.label(function (d) {
if (goodYesNoPieChart.hasFilter() && !goodYesNoPieChart.hasFilter(d.key)) {
return d.key + '(0%)';
}
var label = d.key;
if (all.value()) {
label += '(' + Math.floor(d.value / all.value() * 100) + '%)';
}
return label;
})
dc.renderAll();
//## change slider score value to re-assign the data in pie chart
function updateSlider(slideValue) {
var sliderDiv = document.getElementById("sliderValue");
sliderDiv.innerHTML = slideValue;
coreCount.dispose();
coreCount = coreCount_from_threshold();
coreCountGroup = coreCount.group();
goodYesNoPieChart
.dimension(coreCount)
.group(coreCountGroup);
dc.redrawAll();
}
</script>
</div>
</body>
</html>
我是不是做错了什么？有人可以帮我吗
最佳答案
尝试使用以下链接加载:
https://cdnjs.cloudflare.com/ajax/libs/crossfilter/1.3.7/crossfilter.js
https://cdnjs.cloudflare.com/ajax/libs/dc/2.1.0-dev/dc.js
https://cdnjs.cloudflare.com/ajax/libs/dc/1.6.0/dc.css
希望这些链接对您有所帮助。
关于javascript - 如何加载dc.js和crossfilter.js？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/39518195/