Documentation at Data Visualization with D3.js - Week 1
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<head>
<meta charset="utf-8">
<script src="https://d3js.org/d3.v4.min.js"></script>
<style>
body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
svg {
border: solid 1px #808080;
}
circle {
fill: pink;
}
</style>
</head>
<body>
<svg width="960" height="500">
<g transform="translate(10, 10) scale(1.5)">
<!-- <g transform="scale(1.5) translate(10, 100)"> -->
<circle cx=200 cy=250 r = 25 />
<circle cx=200 cy=100 r=30 />
<circle cx=500 cy=200 r=20 />
</g>
</svg>
</body>
https://d3js.org/d3.v4.min.js