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[D3] Load and Inspect Data with D3 v4

You probably use a framework or standalone library to load data into your apps, but what if that’s overkill for your needs? What if you’re just putting together a quick demo? This lesson demonstrates D3’s APIs for loading data on its own, as well as…

[D3] Build an Area Chart with D3 v4

Similar to line charts, area charts are great for displaying temporal data. Whether you’re displaying a single set of data or multiple sets using an overlapping or stacked layout, D3 provides APIs to make the process straightforward. This lesson walk…

[D3] Build a Line Chart with D3 v4

Line charts are often used to plot temporal data, like a stock price over time. In this lesson we’ll see how to use D3 APIs to create our own simplified version of the charts seen on Google Finance. var margin = { top: 10, right: 20, bottom: 65, left…

Unable to load type System.Data.Entity.DynamicProxiesXXXXXrequired for deserialization.

Memcache实例的Get方法时抛出了异常“Unable to load type System.Data.Entity.DynamicProxies.AdInfoItems_19CD09C8E46569CE66DA116258344075907E70CA60DDAA48F3D8B1AC0085248D required for deserialization.”,字面上的意思是没有反序列化.仔细检查了相关类,发现都有加“[Serializable]”. 项目是用EF做的,memcache里存…

[D3] Build a Scatter Plot with D3 v4

Scatter plots, sometimes also known as bubble charts, are another common type of visualization. They’re extremely versatile thanks to their ability to display multiple dimensions of data simultaneously using x and y position, opacity, color, and even…

[D3] Build a Column Chart with D3 v4

Column and bar charts are staples of every visualization library. They also make a great project for combining the essential pieces of D3 like selections, scales, axes, and SVG elements. This lesson walks you through the process of creating an essent…

d3 之deal with data

之前说慢慢写有关D3的笔记,结果做完那个拓扑图就没写了,今天发现关于d3的用法有点遗忘.感觉有回顾一遍的必要. 之前的序对D3有一个简单的介绍,下面就做一些细节的东西.主要是贴代码,顺带注释和效果图. <html> <head> <meta charset="utf-8"> <title>d3研究室</title> <style> .h-bar{ width:21px; background-color: char…

[D3] Animate Chart Axis Transitions in D3 v4

When the data being rendered by a chart changes, sometimes it necessitates a change to the scales and axes of the chart as well. This lesson demonstrates how to animate and synchronize axis transitions on a column chart. var svg = d3.select('.chart')…

d3可视化实战02：理解d3数据驱动的真正含义

前文中已经提到,SVG从诞生之初起就可以非常方便地使用javascript脚本语言来进行其DOM对象的控制.当然,控制的方法有很多,有直接控制SVG对象的方法,例如使用原生js:有帮你封装一下图形接口再进行直接控制的js类库,如 Raphaël.但是正如我在第一篇文章中所说,d3作为一个中间型类库还能脱颖而出的重要原因,在于它突破了其他类库的那种直接控制表现层的机制,而采用了对于web图形处理领域较为新颖的数据驱动机制(2011),并获得了极大的成功. 数据驱动的历史 数据驱动编程并不是一个新鲜…

d3.svg.line()错误：TypeError: d3.svg.line is not a function

var line_generator= d3.svg.line() .x(function (d,i) { return i; }) .y(function (d) { return d; }) 错误:TypeError: d3.svg.line is not a function 原因: 你使用D3 v4 .从版本4开始,没有 d3.svg ,因此出现错误消息.您要查找的行生成器现在定义为d3.line(). 如果您仍在使用版本3,则会是 d3.svg.line(). 解决方法: var li…