Charts communicate ideas with simplicity, clarity, and detail.

Once you're comfortable with D3 you can quickly:

* understand key metrics at a glance
* catch anomalies (before they turn into problems)
* give key insights to your customers
* and impress your boss and co-workers

Today, I will show you the exact methods I use to create beautiful, understandable data visualizations using D3.

The Fullstack D3 masterclass is the complete guide to D3. With dozens of code examples showing each step, you will gain new insights into your data by creating visualizations in this self-paced online course.

Fullstack D3 Masterclass

---
title: "Creating our scales in React"
description: "Next, we need to create our scales. We also create scaled accessor functions to pass to the children of our Timeline, so they don't need to know about our scales."
useMdx: true
privateVideoUrl: https://fullstack.wistia.com/medias/k8rlstvm42
codeFolder: course/module_07/lesson_07.05/code/end
---

## Creating our scales

<CodeSandboxEmbed
  src="//codesandbox.io/s/772i3?fontsize=14&hidenavigation=1&theme=dark&autoresize=1&module=/src/Timeline.jsx"
  style={{width: '100%', height: '35em'}}
/>

Next up, we need to create the scales to convert from the data domain to the pixel domain. Let's pop back to `src/Timeline.jsx`.

We'll create scales just like we did in **Module 1** — we'll need an time-based **xScale** and a linear **yScale**.

Next, we need to create our scales. We also create scaled accessor functions to pass to the children of our Timeline, so they don't need to know about our scales.