d3.min.js 未捕获的类型错误:a.map 不是函数
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【中文标题】d3.min.js 未捕获的类型错误:a.map 不是函数【英文标题】:d3.min.js Uncaught TypeError: a.map is not a function 【发布时间】:2016-05-12 02:24:27 【问题描述】:我开始使用 D3,我正在尝试使用我自己的 JSON 来处理 example。代码显示 Uncaught TypeError: a.map is not a function, but the JSON is already parsed, so I don't know what can be.
这是我的代码:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Step 1 - A Basic Pie Chart</title>
</head>
<body>
<div id="chart"></div>
<script type=text/javascript src="url_for('static', filename='d3.min.js') "></script>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<script>
(function(d3)
'use strict';
var width = 360;
var height = 360;
var radius = Math.min(width, height) / 2;
var color = d3.scale.category20b();
var svg = d3.select('#chart')
.append('svg')
.attr('width', width)
.attr('height', height)
.append('g')
.attr('transform', 'translate(' + (width / 2) +
',' + (height / 2) + ')');
var arc = d3.svg.arc()
.outerRadius(radius);
var pie = d3.layout.pie()
.value(function(d) return d.Value; )
.sort(null);
d3.json('https://demo-url.com/api/v1.0/tables/56afce8f243c48393e5b665a'
, function(error, dataset)
if (error) throw error;
var path = svg.selectAll('path')
.data(pie(dataset))
.enter()
.append('path')
.attr('d', arc)
.attr('fill', function(d, i)
return color(d.data.Name);
);
);
)(window.d3);
</script>
</body>
</html>
这是页面 JSON 返回的内容:
curl -i -X GET https://demo-url.com/api/v1.0/tables/56afce8f243c48393e5b665a
HTTP/1.1 200 OK
content-type: application/json
content-length: 702
server: Werkzeug/0.11.3 Python/2.7.6
date: Wed, 03 Feb 2016 02:56:32 GMT
X-BACKEND: apps-proxy
"data": ["_id": "$oid": "56afcea3243c48393e5b665f", "idDatasource": "$oid": "56afce8f243c48393e5b665a", "Id": 5, "Value": 0, "Name": "Brock", "_id": "$oid": "56afcea3243c48393e5b665d", "idDatasource": "$oid": "56afce8f243c48393e5b665a", "Id": 3, "Value": 0, "Name": "Peter", "_id": "$oid": "56afcea3243c48393e5b665e", "idDatasource": "$oid": "56afce8f243c48393e5b665a", "Id": 4, "Value": 0, "Name": "John", "_id": "$oid": "56afcea3243c48393e5b665b", "idDatasource": "$oid": "56afce8f243c48393e5b665a", "Id": 1, "Value": 0, "Name": "Ash", "_id": "$oid": "56afcea3243c48393e5b665c", "idDatasource": "$oid": "56afce8f243c48393e5b665a", "Id": 2, "Value": 0, "Name": "Sarah"]
【问题讨论】:
【参考方案1】:那是因为pie
函数需要一个数组作为它的参数,你传递的是一个对象dataset
。
尝试传递dataset.data
,它是一个数组
var path = svg.selectAll('path')
.data(pie(dataset.data))
.enter()
.append('path')
.attr('d', arc)
.attr('fill', function(d, i)
return color(d.data.Name);
);
【讨论】:
太棒了,有效,但没有显示示例中显示的饼图,我只更改了数据集,我该怎么办?以上是关于d3.min.js 未捕获的类型错误:a.map 不是函数的主要内容,如果未能解决你的问题,请参考以下文章
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