SVG图形的画图程序代码，SVG是一种矢量图形，广泛应用于网页动画，主要特点是放大后不变形，保持同样的清晰度。-SVG graphics drawing program code, SVG is a vector graphics, animation is widely used in web pages, the main characteristic is amplified without distortion, keep the same clarity.

数据可视化工具,可以将数据展现为HTML、SVG和CSS wiki地址https://github.com/mbostock/d3/wiki-D3.js is a Javascr ipt library for manipulating documents based on data. D3 helps you bring data to life using HTML, SVG, and CSS. D3’s emphasis on web standards gives you the f