【D3.V3.js系列课程】-（八）绘制SVG-JavaSript-爱易网页

【D3.V3.js系列课程】-（八）绘制SVG

日期：2014-05-16　浏览次数：20425 次

【D3.V3.js系列教程】--（八）绘制SVG

1、创建SVG

//Width and height
var w = 500;
var h = 50;
var svg = d3.select("body")
            .append("svg")
            .attr("width", w)   // <-- Here
            .attr("height", h); // <-- and here!

2、数据驱动的SVG

var dataset = [ 5, 10, 15, 20, 25 ];

var dataset = [ 5, 10, 15, 20, 25 ];

var circles = svg.selectAll("circle")
                 .data(dataset)
                 .enter()
                 .append("circle");
circles.attr("cx", function(d, i) {
            return (i * 50) + 25;
        })
       .attr("cy", h/2)
       .attr("r", function(d) {
            return d;
       });

3、源码

<!DOCTYPE html>
<html>
  <head>
		<meta charset="utf-8">
		<title>testD3-7-drawSVG.html</title>
		<script type="text/javascript" src="http://localhost:8080/spring/js/d3.v3.js"></script>
	<style type="text/css">
		</style>
	</head>
	<body>
		<script type="text/javascript">
		//Width and height
			var w = 500;
			var h = 50;
			
			//Data
			var dataset = [ 5, 10, 15, 20, 25 ];
			
			//Create SVG element
			var svg = d3.select("body")
						.append("svg")
						.attr("width", 500)
						.attr("height", 50);

			var circles = svg.selectAll("circle")
			    .data(dataset)
			    .enter()
			    .append("circle");

			circles.attr("cx", function(d, i) {
						return (i * 50) + 25;