饼图：
<script src="d3.js" charset="utf-8"></script>
<script>
window.onload=function (){
let data=[
{name: '1月', data: 375, color: '#CF0'},
{name: '2月', data: 512, color: '#FC0'},
{name: '3月', data: 290, color: '#0CF'},
{name: '4月', data: 175, color: '#0FC'},
];
let g=d3.select('body').append('svg')
.attr('width', 800).attr('height', 600)
.append('g');
let pieGen=d3.pie()
.value(json=>json.data)
.sort((j1,j2)=>0)
.padAngle(()=>{
return 2*Math.PI/180;
});
let arcGen=d3.arc()
.innerRadius(60)
.outerRadius(230)
.cornerRadius(20)
let pieRes=pieGen(data);
pieRes.forEach(pieData=>{
let arcRes=arcGen(pieData);
g.append('path')
.attr('d', arcRes).attr('fill', pieData.data.color);
});
g.attr('transform', 'translate(400,300)');
};
</script>
image.png
Force图
<script src="d3.js" charset="utf-8"></script>
<script>
window.onload=function (){
let oC=document.getElementById('c1');
let gd=oC.getContext('2d');
let W=oC.width,H=oC.height;
//
let nodes=[
{name: 'china', title: '全国'},
{name: 'sd', title: '山东'},
{name: 'sd-jn', title: '济南'},
{name: 'sd-ly', title: '临沂'},
{name: 'sd-dz', title: '德州'},
{name: 'hn', title: '湖南'},
{name: 'hn-cs', title: '长沙'},
{name: 'hn-ld', title: '娄底'},
{name: 'bj', title: '北京'},
];
let links=[
{source: 'sd', target: 'china', dis: 400},
{source: 'sd-jn', target: 'sd', dis: 50},
{source: 'sd-ly', target: 'sd', dis: 50},
{source: 'sd-dz', target: 'sd', dis: 50},
{source: 'hn', target: 'china', dis: 400},
{source: 'hn-cs', target: 'hn', dis: 50},
{source: 'hn-ld', target: 'hn', dis: 50},
{source: 'bj', target: 'china', dis: 400},
];
//
let link=d3.forceLink(links)
.id(node=>node.name)
.distance(link=>link.dis);
let sim=d3.forceSimulation()
.nodes(nodes)
.force('link', link)
.force('charge', d3.forceManyBody())
.force('center', d3.forceCenter(W/2, H/2));
sim.on('tick', ()=>{
//console.log(nodes.map(json=>[json.x, json.y].join(' ')));
gd.clearRect(0,0,W,H);
//画点
nodes.forEach(node=>{
gd.beginPath();
gd.arc(node.x, node.y, 4, 0, Math.PI*2, true);
gd.fill();
gd.font='20px 宋体';
gd.fillText(node.title, node.x, node.y);
});
//画线
links.forEach(link=>{
gd.beginPath();
gd.moveTo(link.source.x, link.source.y);
gd.lineTo(link.target.x, link.target.y);
gd.stroke();
});
});
};
</script>
</head>
<body>
<canvas id="c1" width="800" height="600"></canvas>
</body>
image.png
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