114 lines
6.2 KiB
Markdown
114 lines
6.2 KiB
Markdown
---
|
||
id: 587d7fab367417b2b2512bd9
|
||
title: Add Labels to Scatter Plot Circles
|
||
required:
|
||
- src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
|
||
challengeType: 6
|
||
videoUrl: ''
|
||
localeTitle: 添加标签以分散绘图圆圈
|
||
---
|
||
|
||
## Description
|
||
<section id="description">您可以添加文本以在散点图中为点创建标签。目标是显示<code>dataset</code>每个项目的第一个（ <code>x</code> ）和第二个（ <code>y</code> ）字段的逗号分隔值。 <code>text</code>节点需要<code>x</code>和<code>y</code>属性才能将其放置在SVG画布上。在此挑战中， <code>y</code>值（确定高度）可以使用<code>circle</code>用于其<code>cy</code>属性的相同值。 <code>x</code>值可能略大于<code>circle</code>的<code>cx</code>值，因此标签可见。这会将标签推到绘图点的右侧。 </section>
|
||
|
||
## Instructions
|
||
<section id="instructions">使用<code>text</code>元素标记散点图上的每个点。标签的文本应该是用逗号和空格分隔的两个值。例如，第一个点的标签是“34,78”。设置<code>x</code>属性，使其比<code>circle</code>上<code>cx</code>属性使用的值多5个单位。设置<code>y</code>属性的方式与<code>circle</code>上的<code>cy</code>值相同。 </section>
|
||
|
||
## Tests
|
||
<section id='tests'>
|
||
|
||
```yml
|
||
tests:
|
||
- text: 您的代码应该有10个<code>text</code>元素。
|
||
testString: 'assert($("text").length == 10, "Your code should have 10 <code>text</code> elements.");'
|
||
- text: '第一个标签的文本应为“34,78”， <code>x</code>值为39， <code>y</code>值为422。'
|
||
testString: 'assert($("text").eq(0).text() == "34, 78" && $("text").eq(0).attr("x") == "39" && $("text").eq(0).attr("y") == "422", "The first label should have text of "34, 78", an <code>x</code> value of 39, and a <code>y</code> value of 422.");'
|
||
- text: '第二个标签的文本应为“109,280”， <code>x</code>值为114， <code>y</code>值为220。'
|
||
testString: 'assert($("text").eq(1).text() == "109, 280" && $("text").eq(1).attr("x") == "114" && $("text").eq(1).attr("y") == "220", "The second label should have text of "109, 280", an <code>x</code> value of 114, and a <code>y</code> value of 220.");'
|
||
- text: '第三个标签的文本应为“310,120”， <code>x</code>值为315， <code>y</code>值为380。'
|
||
testString: 'assert($("text").eq(2).text() == "310, 120" && $("text").eq(2).attr("x") == "315" && $("text").eq(2).attr("y") == "380", "The third label should have text of "310, 120", an <code>x</code> value of 315, and a <code>y</code> value of 380.");'
|
||
- text: '第四个标签的文本应为“79,411”， <code>x</code>值为84， <code>y</code>值为89。'
|
||
testString: 'assert($("text").eq(3).text() == "79, 411" && $("text").eq(3).attr("x") == "84" && $("text").eq(3).attr("y") == "89", "The fourth label should have text of "79, 411", an <code>x</code> value of 84, and a <code>y</code> value of 89.");'
|
||
- text: '第五个标签的文本应为“420,220”， <code>x</code>值为425， <code>y</code>值为280。'
|
||
testString: 'assert($("text").eq(4).text() == "420, 220" && $("text").eq(4).attr("x") == "425" && $("text").eq(4).attr("y") == "280", "The fifth label should have text of "420, 220", an <code>x</code> value of 425, and a <code>y</code> value of 280.");'
|
||
- text: '第六个标签的文本应为“233,145”， <code>x</code>值为238， <code>y</code>值为355。'
|
||
testString: 'assert($("text").eq(5).text() == "233, 145" && $("text").eq(5).attr("x") == "238" && $("text").eq(5).attr("y") == "355", "The sixth label should have text of "233, 145", an <code>x</code> value of 238, and a <code>y</code> value of 355.");'
|
||
- text: '第七个标签的文本应为“333,96”， <code>x</code>值为338， <code>y</code>值为404。'
|
||
testString: 'assert($("text").eq(6).text() == "333, 96" && $("text").eq(6).attr("x") == "338" && $("text").eq(6).attr("y") == "404", "The seventh label should have text of "333, 96", an <code>x</code> value of 338, and a <code>y</code> value of 404.");'
|
||
- text: '第八个标签的文本应为“222,333”， <code>x</code>值为227， <code>y</code>值为167。'
|
||
testString: 'assert($("text").eq(7).text() == "222, 333" && $("text").eq(7).attr("x") == "227" && $("text").eq(7).attr("y") == "167", "The eighth label should have text of "222, 333", an <code>x</code> value of 227, and a <code>y</code> value of 167.");'
|
||
- text: '第九个标签的文本应为“78,320”， <code>x</code>值为83， <code>y</code>值为180。'
|
||
testString: 'assert($("text").eq(8).text() == "78, 320" && $("text").eq(8).attr("x") == "83" && $("text").eq(8).attr("y") == "180", "The ninth label should have text of "78, 320", an <code>x</code> value of 83, and a <code>y</code> value of 180.");'
|
||
- text: '第十个标签的文本应为“21,123”， <code>x</code>值为26， <code>y</code>值为377。'
|
||
testString: 'assert($("text").eq(9).text() == "21, 123" && $("text").eq(9).attr("x") == "26" && $("text").eq(9).attr("y") == "377", "The tenth label should have text of "21, 123", an <code>x</code> value of 26, and a <code>y</code> value of 377.");'
|
||
|
||
```
|
||
|
||
</section>
|
||
|
||
## Challenge Seed
|
||
<section id='challengeSeed'>
|
||
|
||
<div id='html-seed'>
|
||
|
||
```html
|
||
<body>
|
||
<script>
|
||
const dataset = [
|
||
[ 34, 78 ],
|
||
[ 109, 280 ],
|
||
[ 310, 120 ],
|
||
[ 79, 411 ],
|
||
[ 420, 220 ],
|
||
[ 233, 145 ],
|
||
[ 333, 96 ],
|
||
[ 222, 333 ],
|
||
[ 78, 320 ],
|
||
[ 21, 123 ]
|
||
];
|
||
|
||
|
||
const w = 500;
|
||
const h = 500;
|
||
|
||
const svg = d3.select("body")
|
||
.append("svg")
|
||
.attr("width", w)
|
||
.attr("height", h);
|
||
|
||
svg.selectAll("circle")
|
||
.data(dataset)
|
||
.enter()
|
||
.append("circle")
|
||
.attr("cx", (d, i) => d[0])
|
||
.attr("cy", (d, i) => h - d[1])
|
||
.attr("r", 5);
|
||
|
||
svg.selectAll("text")
|
||
.data(dataset)
|
||
.enter()
|
||
.append("text")
|
||
// Add your code below this line
|
||
|
||
|
||
|
||
// Add your code above this line
|
||
</script>
|
||
</body>
|
||
|
||
```
|
||
|
||
</div>
|
||
|
||
|
||
|
||
</section>
|
||
|
||
## Solution
|
||
<section id='solution'>
|
||
|
||
```js
|
||
// solution required
|
||
```
|
||
</section>
|