How to Make a Contour Map
Filled contour plots are useful for looking at density across two dimensions and are often used to visualize geographic data. It’s straightforward to make them in R — once you get your data in the right format, that is.
To access this full tutorial and download the source code you must be a member. (If you are already a member, log in here.)
Gain unlimited access to this tutorial and over a hundred more, plus courses and guides!
Gain unlimited access to hundreds of hours worth of step-by-step visualization courses and tutorials for insight and presentation — all while supporting an independent site. Source code and data is included so that you can more easily apply what you learn in your own work.
The tutorials are very helpful to move from "Oooo, cool!" to how to actually DO the cool.
Members also recieve a weekly newsletter, The Process, which looks more closely at the tools, the rules, and the guidelines and how they work in practice.
See samples of everything you gain access to:
More Tutorials See All →
Getting Started with Charts in R
You get a lot of bang for the buck with R, charting-wise, but it can be confusing at first, especially if you’ve never written code. Here are some examples to get started.
Symbols-based Unit Charts to Show Counts in R
Add visual weight by using individual items to show counts.
Using Transparency in R to Improve Clarity
When you plot a lot of data at once, points and lines can obscure others and hide patterns. Transparency can help reveal what is really there.