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Add External Stylesheets/Pens

Any URL's added here will be added as <link>s in order, and before the CSS in the editor. If you link to another Pen, it will include the CSS from that Pen. If the preprocessor matches, it will attempt to combine them before processing.

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Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

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Use npm Packages

We can make npm packages available for you to use in your JavaScript. We use webpack to prepare them and make them available to import. We'll also process your JavaScript with Babel.

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HTML Settings

Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.


  <svg id="sample">

  border:solid 3px #cccccc;
  height: 300px;
  width: 300px;
              values = [0,150,200]; //yの値

function update() {
  // 配列の個数を n に代入。xの値になる。
  var n = values.length;

  // 線を引く
  var polyline = d3.select('svg#sample').selectAll('polyline').data(values).enter()
    // アトリビュートは一つズス設定
    .attr('points', values.map(function(d, i) {
      return (30) + ' ' + (30);
  // <svg> の中の <circle> n回追加し、values を割り当てる
  var circles = d3.select("svg#sample").selectAll('circle').data(values)
  // アトリビュートは一つズス設定
    .attr('fill', 'red')
    .attr('cx', function(d, i) { return i * 280 / n + 90; })
    .attr('cy', function(d, i) { return d * 280 + 90; })
    .attr('r', 5);

  // アニメーションの設定。
    .attr('fill', 'green')
    .attr('cx', function(d, i) { return i * 280/n + 30; })
    .attr('cy', function(d, i) { return d + 30; })
    .attr('r', 20);
  console.log (n);

  // 線の位置は同じ数値を
    .attr('points', values.map(function(d, i) {
      return (i*280/n + 30) + ' ' + (d + 30);
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