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* 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 Co-authored-by: Shaun Hamilton <51722130+ShaunSHamilton@users.noreply.github.com> * fix: no colour backticks Co-authored-by: Shaun Hamilton <51722130+ShaunSHamilton@users.noreply.github.com> 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 Co-authored-by: Randell Dawson <5313213+RandellDawson@users.noreply.github.com> * 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>
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id, title, challengeType, forumTopicId, dashedName
| id | title | challengeType | forumTopicId | dashedName |
|---|---|---|---|---|
| 587d7fa8367417b2b2512bca | Change the Presentation of a Bar Chart | 6 | 301481 | change-the-presentation-of-a-bar-chart |
--description--
The last challenge created a bar chart, but there are a couple of formatting changes that could improve it:
-
Add space between each bar to visually separate them, which is done by adding a margin to the CSS for the
barclass -
Increase the height of the bars to better show the difference in values, which is done by multiplying the value by a number to scale the height
--instructions--
First, add a margin of 2px to the bar class in the style tag. Next, change the callback function in the style() method so it returns a value 10 times the original data value (plus the px).
Note: Multiplying each data point by the same constant only alters the scale. It's like zooming in, and it doesn't change the meaning of the underlying data.
--hints--
The first div should have a height of 120 pixels and a margin of 2 pixels.
assert(
$('div').eq(0).css('height') == '120px' &&
$('div').eq(0).css('margin-right') == '2px'
);
The second div should have a height of 310 pixels and a margin of 2 pixels.
assert(
$('div').eq(1).css('height') == '310px' &&
$('div').eq(1).css('margin-right') == '2px'
);
The third div should have a height of 220 pixels and a margin of 2 pixels.
assert(
$('div').eq(2).css('height') == '220px' &&
$('div').eq(2).css('margin-right') == '2px'
);
The fourth div should have a height of 170 pixels and a margin of 2 pixels.
assert(
$('div').eq(3).css('height') == '170px' &&
$('div').eq(3).css('margin-right') == '2px'
);
The fifth div should have a height of 250 pixels and a margin of 2 pixels.
assert(
$('div').eq(4).css('height') == '250px' &&
$('div').eq(4).css('margin-right') == '2px'
);
The sixth div should have a height of 180 pixels and a margin of 2 pixels.
assert(
$('div').eq(5).css('height') == '180px' &&
$('div').eq(5).css('margin-right') == '2px'
);
The seventh div should have a height of 290 pixels and a margin of 2 pixels.
assert(
$('div').eq(6).css('height') == '290px' &&
$('div').eq(6).css('margin-right') == '2px'
);
The eighth div should have a height of 140 pixels and a margin of 2 pixels.
assert(
$('div').eq(7).css('height') == '140px' &&
$('div').eq(7).css('margin-right') == '2px'
);
The ninth div should have a height of 90 pixels and a margin of 2 pixels.
assert(
$('div').eq(8).css('height') == '90px' &&
$('div').eq(8).css('margin-right') == '2px'
);
--seed--
--seed-contents--
<style>
.bar {
width: 25px;
height: 100px;
/* Add your code below this line */
/* Add your code above this line */
display: inline-block;
background-color: blue;
}
</style>
<body>
<script>
const dataset = [12, 31, 22, 17, 25, 18, 29, 14, 9];
d3.select("body").selectAll("div")
.data(dataset)
.enter()
.append("div")
.attr("class", "bar")
.style("height", (d) => (d + "px")) // Change this line
</script>
</body>
--solutions--
<style>
.bar {
width: 25px;
height: 100px;
margin: 2px;
display: inline-block;
background-color: blue;
}
</style>
<body>
<script>
const dataset = [12, 31, 22, 17, 25, 18, 29, 14, 9];
d3.select("body").selectAll("div")
.data(dataset)
.enter()
.append("div")
.attr("class", "bar")
.style("height", (d) => (d * 10 + "px"))
</script>
</body>