我使用 d3 创建了一个简单的力导向图:http: //goo.gl/afHTD
为什么图表的边缘不显示?这是我的整个 HTML 文件。当然,您也可以通过在我的链接页面上查看源代码来查看和修改它。它基于 d3 网站上的示例。
<!DOCTYPE html>
<html>
<head>
<title>Force-Directed Layout</title>
<script type="text/javascript" src="d3.v2.js"></script>
<style type="text/css">
div.node {
border-radius: 6px;
width: 12px;
height: 12px;
margin: -6px 0 0 -6px;
position: absolute;
}
div.link {
position: absolute;
border-bottom: solid #999 1px;
height: 0;
-webkit-transform-origin: 0 0;
-moz-transform-origin: 0 0;
-ms-transform-origin: 0 0;
-o-transform-origin: 0 0;
transform-origin: 0 0;
}
</style>
</head>
<body>
<div id="chart"></div>
<script type="text/javascript">
var width = 960,
height = 500;
var color = d3.scale.category20();
var force = d3.layout.force()
.charge(-120)
.linkDistance(30)
.size([width, height]);
var svg = d3.select("#chart").append("svg")
.attr("width", width)
.attr("height", height);
d3.json("newJson.json", function(json) {
force
.nodes(json.nodes)
.links(json.links)
.start();
var link = svg.selectAll("line.link")
.data(json.links)
.enter().append("line")
.attr("class", "link")
.style("stroke-width", function(d) { return Math.sqrt(d.value); });
var node = svg.selectAll("circle.node")
.data(json.nodes)
.enter().append("circle")
.attr("class", "node")
.attr("r", 5)
.style("fill", function(d) { return color(d.group); })
.call(force.drag);
node.append("title")
.text(function(d) { return d.name; });
force.on("tick", function() {
link.attr("x1", function(d) { return d.source.x; })
.attr("y1", function(d) { return d.source.y; })
.attr("x2", function(d) { return d.target.x; })
.attr("y2", function(d) { return d.target.y; });
node.attr("cx", function(d) { return d.x; })
.attr("cy", function(d) { return d.y; });
});
});
</script>
</body>
</html>
不应该var link...
显示边缘?我的 JSON 文件也很简单:
{"nodes":
[{"name":"Myriel","group":1},
{"name":"Napoleon","group":1},
{"name":"Napoleon","group":2}],
"links":
[{"source":1,"target":0,"value":1},
{"source":1,"target":0,"value":1},
{"source":1, "target":2, "value":1}]}