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 makes it easy to add meaningful animations to your data visualizations. Whether it’s fading in new items or tweening existing shapes to display new values, adding transitions is easy. This lesson shows you how to add animations while building on y…
Most charts aren’t complete without axes to provide context and labeling for the graphical elements being displayed. This lesson introduces D3’s APIs for creating, customizing, and displaying axes while building on topics from previous lessons. var m…
D3 transitions start executing as soon as they’re created, and they’re destroyed once they end. This can present some challenges when attempting to create reusable transitions. This lesson demonstrates how to overcome those challenges using various a…
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…
用 D3.js 做一个简单的柱形图. 做柱形图有很多种方法,比如用 HTML 的 div 标签,或用 svg . 推荐用 SVG 来做各种图形.SVG 意为可缩放矢量图形(Scalable Vector Graphics),SVG 使用 XML 格式定义图像,不清楚什么是SVG的朋友请先在 w3cschools 学习下,内容很少,很快就能掌握,不需要记住各种标签,只要知道大概是什么就行,用的时候再查. 先看下面的代码: <script src="http://d3js.org/d3.v3.…
In D3, the General Update Pattern is the name given to what happens when a data join is followed by operations on the enter, update, and exit selections. When a chart's data changes over time and each update can both create new elements and destroy e…
<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title></title> <script src="../bower_components/underscore/underscore-min.js"></script> <script src="../v…
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…
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…