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freeCodeCamp/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-labels-to-scatter-plot-circles.md
Nicholas Carrigan (he/him) 16e420021c chore: audit data visualisation challenges (#41336)
* chore(learn): audit d3 projects

* chore: audit data vis

* chore: audit json apis

* Update curriculum/challenges/english/04-data-visualization/data-visualization-projects/visualize-data-with-a-scatterplot-graph.md

Co-authored-by: Shaun Hamilton <51722130+ShaunSHamilton@users.noreply.github.com>

* fix: apply suggestions

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* fix: no colour backticks

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Co-authored-by: Randell Dawson <5313213+RandellDawson@users.noreply.github.com>

* Update curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/get-geolocation-data-to-find-a-users-gps-coordinates.md

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* Apply suggestions from code review

Co-authored-by: Shaun Hamilton <51722130+ShaunSHamilton@users.noreply.github.com>

Co-authored-by: Shaun Hamilton <51722130+ShaunSHamilton@users.noreply.github.com>
Co-authored-by: Randell Dawson <5313213+RandellDawson@users.noreply.github.com>
2021-03-05 12:25:29 -07:00

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---
id: 587d7fab367417b2b2512bd9
title: Add Labels to Scatter Plot Circles
challengeType: 6
forumTopicId: 301477
dashedName: add-labels-to-scatter-plot-circles
---
# --description--
You can add text to create labels for the points in a scatter plot.
The goal is to display the comma-separated values for the first (`x`) and second (`y`) fields of each item in `dataset`.
The `text` nodes need `x` and `y` attributes to position it on the SVG canvas. In this challenge, the `y` value (which determines height) can use the same value that the `circle` uses for its `cy` attribute. The `x` value can be slightly larger than the `cx` value of the `circle`, so the label is visible. This will push the label to the right of the plotted point.
# --instructions--
Label each point on the scatter plot using the `text` elements. The text of the label should be the two values separated by a comma and a space. For example, the label for the first point is `34, 78`. Set the `x` attribute so it's `5` units more than the value you used for the `cx` attribute on the `circle`. Set the `y` attribute the same way that's used for the `cy` value on the `circle`.
# --hints--
Your code should have 10 `text` elements.
```js
assert($('text').length == 10);
```
The first label should have text of `34, 78`, an `x` value of `39`, and a `y` value of `422`.
```js
assert(
$('text').eq(0).text() == '34, 78' &&
$('text').eq(0).attr('x') == '39' &&
$('text').eq(0).attr('y') == '422'
);
```
The second label should have text of `109, 280`, an `x` value of `114`, and a `y` value of `220`.
```js
assert(
$('text').eq(1).text() == '109, 280' &&
$('text').eq(1).attr('x') == '114' &&
$('text').eq(1).attr('y') == '220'
);
```
The third label should have text of `310, 120`, an `x` value of `315`, and a `y` value of `380`.
```js
assert(
$('text').eq(2).text() == '310, 120' &&
$('text').eq(2).attr('x') == '315' &&
$('text').eq(2).attr('y') == '380'
);
```
The fourth label should have text of `79, 411`, an `x` value of `84`, and a `y` value of `89`.
```js
assert(
$('text').eq(3).text() == '79, 411' &&
$('text').eq(3).attr('x') == '84' &&
$('text').eq(3).attr('y') == '89'
);
```
The fifth label should have text of `420, 220`, an `x` value of `425`, and a `y` value of `280`.
```js
assert(
$('text').eq(4).text() == '420, 220' &&
$('text').eq(4).attr('x') == '425' &&
$('text').eq(4).attr('y') == '280'
);
```
The sixth label should have text of `233, 145`, an `x` value of `238`, and a `y` value of `355`.
```js
assert(
$('text').eq(5).text() == '233, 145' &&
$('text').eq(5).attr('x') == '238' &&
$('text').eq(5).attr('y') == '355'
);
```
The seventh label should have text of `333, 96`, an `x` value of `338`, and a `y` value of `404`.
```js
assert(
$('text').eq(6).text() == '333, 96' &&
$('text').eq(6).attr('x') == '338' &&
$('text').eq(6).attr('y') == '404'
);
```
The eighth label should have text of `222, 333`, an `x` value of `227`, and a `y` value of `167`.
```js
assert(
$('text').eq(7).text() == '222, 333' &&
$('text').eq(7).attr('x') == '227' &&
$('text').eq(7).attr('y') == '167'
);
```
The ninth label should have text of `78, 320`, an `x` value of `83`, and a `y` value of `180`.
```js
assert(
$('text').eq(8).text() == '78, 320' &&
$('text').eq(8).attr('x') == '83' &&
$('text').eq(8).attr('y') == '180'
);
```
The tenth label should have text of `21, 123`, an `x` value of `26`, and a `y` value of `377`.
```js
assert(
$('text').eq(9).text() == '21, 123' &&
$('text').eq(9).attr('x') == '26' &&
$('text').eq(9).attr('y') == '377'
);
```
# --seed--
## --seed-contents--
```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>
```
# --solutions--
```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")
.attr("x", (d) => d[0] + 5)
.attr("y", (d) => h - d[1])
.text((d) => (d[0] + ", " + d[1]))
</script>
</body>
```