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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>
5.6 KiB
id, title, challengeType, forumTopicId, dashedName
| id | title | challengeType | forumTopicId | dashedName |
|---|---|---|---|---|
| 587d7fab367417b2b2512bd9 | Add Labels to Scatter Plot Circles | 6 | 301477 | 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.
assert($('text').length == 10);
The first label should have text of 34, 78, an x value of 39, and a y value of 422.
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.
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.
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.
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.
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.
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.
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.
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.
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.
assert(
$('text').eq(9).text() == '21, 123' &&
$('text').eq(9).attr('x') == '26' &&
$('text').eq(9).attr('y') == '377'
);
--seed--
--seed-contents--
<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--
<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>