84 lines
2.1 KiB
Markdown
84 lines
2.1 KiB
Markdown
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---
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id: 587d7fab367417b2b2512bd7
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title: Create a Scatterplot with SVG Circles
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required:
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- src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
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challengeType: 6
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videoUrl: ''
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localeTitle: 使用SVG圈创建散点图
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---
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## Description
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<section id="description">散点图是另一种可视化。它通常使用圆来映射数据点，每个数据点都有两个值。这些值与<code>x</code>和<code>y</code>轴相关联，用于在可视化中定位圆。 SVG有一个<code>circle</code>标记来创建圆形。它的工作方式与条形图中使用的<code>rect</code>元素非常相似。 </section>
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## Instructions
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<section id="instructions">使用<code>data()</code> ， <code>enter()</code>和<code>append()</code>方法将<code>dataset</code>绑定到附加到SVG画布的新<code>circle</code>元素。 <strong>注意</strong> <br>圆圈将不可见，因为我们尚未设置其属性。我们将在下一次挑战中做到这一点。 </section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: 您的代码应该有10个<code>circle</code>元素。
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testString: 'assert($("circle").length == 10, "Your code should have 10 <code>circle</code> elements.");'
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='html-seed'>
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```html
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<body>
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<script>
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const dataset = [
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[ 34, 78 ],
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[ 109, 280 ],
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[ 310, 120 ],
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[ 79, 411 ],
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[ 420, 220 ],
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[ 233, 145 ],
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[ 333, 96 ],
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[ 222, 333 ],
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[ 78, 320 ],
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[ 21, 123 ]
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];
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const w = 500;
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const h = 500;
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const svg = d3.select("body")
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.append("svg")
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.attr("width", w)
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.attr("height", h);
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svg.selectAll("circle")
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// Add your code below this line
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// Add your code above this line
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</script>
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</body>
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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// solution required
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```
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</section>
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