freeCodeCamp/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/create-a-bar-for-each-data-...

---
id: 587d7fa8367417b2b2512bcd
title: Create a Bar for Each Data Point in the Set
challengeType: 6
forumTopicId: 301482
dashedName: create-a-bar-for-each-data-point-in-the-set
---

# --description--

The last challenge added only one rectangle to the `svg` element to represent a bar. Here, you'll combine what you've learned so far about `data()`, `enter()`, and SVG shapes to create and append a rectangle for each data point in `dataset`.

A previous challenge showed the format for how to create and append a `div` for each item in `dataset`:

```js
d3.select("body").selectAll("div")
  .data(dataset)
  .enter()
  .append("div")
```

There are a few differences working with `rect` elements instead of `divs`. The `rects` must be appended to an `svg` element, not directly to the `body`. Also, you need to tell D3 where to place each `rect` within the `svg` area. The bar placement will be covered in the next challenge.

# --instructions--

Use the `data()`, `enter()`, and `append()` methods to create and append a `rect` for each item in `dataset`. The bars should display all on top of each other; this will be fixed in the next challenge.

# --hints--

Your document should have 9 `rect` elements.

```js
assert($('rect').length == 9);
```

Your code should use the `data()` method.

```js
assert(code.match(/\.data/g));
```

Your code should use the `enter()` method.

```js
assert(code.match(/\.enter/g));
```

Your code should use the `append()` method.

```js
assert(code.match(/\.append/g));
```

# --seed--

## --seed-contents--

```html
<body>
  <script>
    const dataset = [12, 31, 22, 17, 25, 18, 29, 14, 9];

    const w = 500;
    const h = 100;

    const svg = d3.select("body")
                  .append("svg")
                  .attr("width", w)
                  .attr("height", h);

    svg.selectAll("rect")
       // Add your code below this line


       // Add your code above this line
       .attr("x", 0)
       .attr("y", 0)
       .attr("width", 25)
       .attr("height", 100);
  </script>
</body>
```

# --solutions--

```html
<body>
  <script>
    const dataset = [12, 31, 22, 17, 25, 18, 29, 14, 9];

    const w = 500;
    const h = 100;

    const svg = d3.select("body")
                  .append("svg")
                  .attr("width", w)
                  .attr("height", h);

    svg.selectAll("rect")
       .data(dataset)
       .enter()
       .append("rect")
       .attr("x", 0)
       .attr("y", 0)
       .attr("width", 25)
       .attr("height", 100);
  </script>
</body>
```
feat(challenge-md): Add initial markdown challenge files 2018-09-30 22:01:58 +00:00			`---`
			`id: 587d7fa8367417b2b2512bcd`
			`title: Create a Bar for Each Data Point in the Set`
			`challengeType: 6`
fix(curriculum): Added forumTopicId to remaining 1200 challeng… (#36558) 2019-08-05 16:17:33 +00:00			`forumTopicId: 301482`
feat(curriculum): restore seed + solution to Chinese (#40683) * feat(tools): add seed/solution restore script * chore(curriculum): remove empty sections' markers * chore(curriculum): add seed + solution to Chinese * chore: remove old formatter * fix: update getChallenges parse translated challenges separately, without reference to the source * chore(curriculum): add dashedName to English * chore(curriculum): add dashedName to Chinese * refactor: remove unused challenge property 'name' * fix: relax dashedName requirement * fix: stray tag Remove stray `pre` tag from challenge file. Signed-off-by: nhcarrigan <nhcarrigan@gmail.com> Co-authored-by: nhcarrigan <nhcarrigan@gmail.com> 2021-01-13 02:31:00 +00:00			`dashedName: create-a-bar-for-each-data-point-in-the-set`
feat(challenge-md): Add initial markdown challenge files 2018-09-30 22:01:58 +00:00			`---`

Feat: add new Markdown parser (#39800) and change all the challenges to new `md` format. 2020-11-27 18:02:05 +00:00			`# --description--`

			The last challenge added only one rectangle to the `svg` element to represent a bar. Here, you'll combine what you've learned so far about `data()`, `enter()`, and SVG shapes to create and append a rectangle for each data point in `dataset`.

			A previous challenge showed the format for how to create and append a `div` for each item in `dataset`:
fix(curriculum): Convert blockquote elements to triple backtick syntax for Data Visualization (#35995) * fix: convert data visualization * fix: reverted to blockquote * fix: changed js to json Co-Authored-By: Oliver Eyton-Williams <ojeytonwilliams@gmail.com> * fix: cleaned up code Co-Authored-By: Oliver Eyton-Williams <ojeytonwilliams@gmail.com> 2019-05-14 12:04:05 +00:00
			```js
			`d3.select("body").selectAll("div")`
			`.data(dataset)`
			`.enter()`
			`.append("div")`
			```

Feat: add new Markdown parser (#39800) and change all the challenges to new `md` format. 2020-11-27 18:02:05 +00:00			There are a few differences working with `rect` elements instead of `divs`. The `rects` must be appended to an `svg` element, not directly to the `body`. Also, you need to tell D3 where to place each `rect` within the `svg` area. The bar placement will be covered in the next challenge.

			`# --instructions--`
feat(challenge-md): Add initial markdown challenge files 2018-09-30 22:01:58 +00:00
Feat: add new Markdown parser (#39800) and change all the challenges to new `md` format. 2020-11-27 18:02:05 +00:00			Use the `data()`, `enter()`, and `append()` methods to create and append a `rect` for each item in `dataset`. The bars should display all on top of each other; this will be fixed in the next challenge.
feat(challenge-md): Add initial markdown challenge files 2018-09-30 22:01:58 +00:00
Feat: add new Markdown parser (#39800) and change all the challenges to new `md` format. 2020-11-27 18:02:05 +00:00			`# --hints--`
feat(challenge-md): Add initial markdown challenge files 2018-09-30 22:01:58 +00:00
Feat: add new Markdown parser (#39800) and change all the challenges to new `md` format. 2020-11-27 18:02:05 +00:00			Your document should have 9 `rect` elements.
feat(challenge-md): Add initial markdown challenge files 2018-09-30 22:01:58 +00:00
Feat: add new Markdown parser (#39800) and change all the challenges to new `md` format. 2020-11-27 18:02:05 +00:00			```js
			`assert($('rect').length == 9);`
feat(challenge-md): Add initial markdown challenge files 2018-09-30 22:01:58 +00:00			```

Feat: add new Markdown parser (#39800) and change all the challenges to new `md` format. 2020-11-27 18:02:05 +00:00			Your code should use the `data()` method.
feat(challenge-md): Add initial markdown challenge files 2018-09-30 22:01:58 +00:00
Feat: add new Markdown parser (#39800) and change all the challenges to new `md` format. 2020-11-27 18:02:05 +00:00			```js
			`assert(code.match(/\.data/g));`
			```
feat(challenge-md): Add initial markdown challenge files 2018-09-30 22:01:58 +00:00
Feat: add new Markdown parser (#39800) and change all the challenges to new `md` format. 2020-11-27 18:02:05 +00:00			Your code should use the `enter()` method.

			```js
			`assert(code.match(/\.enter/g));`
			```

			Your code should use the `append()` method.

			```js
			`assert(code.match(/\.append/g));`
			```

			`# --seed--`

			`## --seed-contents--`
feat(challenge-md): Add initial markdown challenge files 2018-09-30 22:01:58 +00:00
			```html
			`<body>`
			`<script>`
			`const dataset = [12, 31, 22, 17, 25, 18, 29, 14, 9];`
fix(challenge-md): Fix quotes that failed in the transform 2018-10-08 00:01:53 +00:00
feat(challenge-md): Add initial markdown challenge files 2018-09-30 22:01:58 +00:00			`const w = 500;`
			`const h = 100;`
fix(challenge-md): Fix quotes that failed in the transform 2018-10-08 00:01:53 +00:00
feat(challenge-md): Add initial markdown challenge files 2018-09-30 22:01:58 +00:00			`const svg = d3.select("body")`
			`.append("svg")`
			`.attr("width", w)`
			`.attr("height", h);`
fix(challenge-md): Fix quotes that failed in the transform 2018-10-08 00:01:53 +00:00
feat(challenge-md): Add initial markdown challenge files 2018-09-30 22:01:58 +00:00			`svg.selectAll("rect")`
			`// Add your code below this line`
fix(challenge-md): Fix quotes that failed in the transform 2018-10-08 00:01:53 +00:00


feat(challenge-md): Add initial markdown challenge files 2018-09-30 22:01:58 +00:00			`// Add your code above this line`
			`.attr("x", 0)`
			`.attr("y", 0)`
			`.attr("width", 25)`
			`.attr("height", 100);`
			`</script>`
			`</body>`
			```

Feat: add new Markdown parser (#39800) and change all the challenges to new `md` format. 2020-11-27 18:02:05 +00:00			`# --solutions--`
feat(challenge-md): Add initial markdown challenge files 2018-09-30 22:01:58 +00:00
Add solution d3challenges (#38222) * added solutions to data visualization with D3 * Update add-a-tooltip-to-a-d3-element.english.md * Update add-attributes-to-the-circle-elements.english.md * Update add-axes-to-a-visualization.english.md * Update add-document-elements-with-d3.english.md * Update add-inline-styling-to-elements.english.md * Update add-labels-to-scatter-plot-circles.english.md * Update change-styles-based-on-data.english.md * Update change-the-color-of-an-svg-element.english.md * Update change-the-presentation-of-a-bar-chart.english.md * Update create-a-bar-for-each-data-point-in-the-set.english.md * Update create-a-linear-scale-with-d3.english.md * Update create-a-scatterplot-with-svg-circles.english.md * Update display-shapes-with-svg.english.md * Update dynamically-change-the-height-of-each-bar.english.md * Update dynamically-set-the-coordinates-for-each-bar.english.md * Update invert-svg-elements.english.md * Update learn-about-svg-in-d3.english.md * Update select-a-group-of-elements-with-d3.english.md * Update set-a-domain-and-a-range-on-a-scale.english.md * Update style-d3-labels.english.md * Update work-with-dynamic-data-in-d3.english.md * Update use-a-pre-defined-scale-to-place-elements.english.md * Update use-dynamic-scales.english.md * Update use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.english.md * Update work-with-data-in-d3.english.md 2020-04-24 11:34:53 +00:00			```html
			`<body>`
			`<script>`
			`const dataset = [12, 31, 22, 17, 25, 18, 29, 14, 9];`

			`const w = 500;`
			`const h = 100;`

			`const svg = d3.select("body")`
			`.append("svg")`
			`.attr("width", w)`
			`.attr("height", h);`

			`svg.selectAll("rect")`
			`.data(dataset)`
			`.enter()`
			`.append("rect")`
			`.attr("x", 0)`
			`.attr("y", 0)`
			`.attr("width", 25)`
			`.attr("height", 100);`
			`</script>`
			`</body>`
feat(challenge-md): Add initial markdown challenge files 2018-09-30 22:01:58 +00:00			```