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Update index.md (#34232)

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The Coding Aviator
2018-11-06 22:50:42 +05:30
committed by Paul Gamble
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guide/english/certifications/data-visualization/data-visualization-with-d3/use-the-d3-max-and-d3-min-functions-to-find-minimum-and-maximum-values-in-a-dataset/index.md
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@ -3,8 +3,30 @@ title: Use the d3.max and d3.min Functions to Find Minimum and Maximum Values in
--- ---
## Use the d3.max and d3.min Functions to Find Minimum and Maximum Values in a Dataset ## Use the d3.max and d3.min Functions to Find Minimum and Maximum Values in a Dataset
This is a stub. <a href='https://github.com/freecodecamp/guides/tree/master/src/pages/certifications/data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset/index.md' target='_blank' rel='nofollow'>Help our community expand it</a>. ### Hint 1
<a href='https://github.com/freecodecamp/guides/blob/master/README.md' target='_blank' rel='nofollow'>This quick style guide will help ensure your pull request gets accepted</a>. Use the `d3.max()` function.
<!-- The article goes here, in GitHub-flavored Markdown. Feel free to add YouTube videos, images, and CodePen/JSBin embeds --> ### Hint 2
Use a callback function.
### Hint 3
Check for the second element in the callback function's array.
### Solution
To solve the solution, you code should look like this, this would check for the `z` co-ordinate i.e. the third element in the array which would be at an index of 2:
```javascript
<body>
<script>
const positionData = [[1, 7, -4],[6, 3, 8],[2, 8, 3]]
const output = d3.max(positionData, (d) => d[2]);
d3.select("body")
.append("h2")
.text(output)
</script>
</body>
```