A Layered Grammar Of Graphics

Hadley Wickham describes some of the decisions he made when putting together ggplot2:

In the examples above, we have seen some of the components that make up a plot:
• data and aesthetic mappings,
• geometric objects,
• scales, and
• facet specification.
We have also touched on two other components:
• statistical transformations, and
• the coordinate system.
Together, the data, mappings, statistical transformation, and geometric object form a layer. A plot may have multiple layers, for example, when we overlay a scatterplot with a smoothed line.

This isn’t an article about how to use ggplot2; rather, it’s an article about implementation decisions.  To that end, I think it’s useful to see some of the logic behind ggplot2’s decisions.

Related Posts

“Pretty But Useless” Visuals

I continue my dashboard visualization series with a bit of an extended rant: The best use of a pie chart is to show a simple share of a static total.  Here, we can see that Daredevil has almost half of the critics’ reviews, and that The Punisher and Jessica Jones are split. This simple pie […]

Read More

The Theory Behind cdata

John Mount has a video explaining the concepts behind cdata: We also have two really nifty articles on the theory and methods: Fluid data reshaping with cdata Coordinatized Data: A Fluid Data Specification Please give it a try! Click through for the video, which I found very helpful in tying together a number of data […]

Read More

Categories

December 2017
MTWTFSS
« Nov Jan »
 123
45678910
11121314151617
18192021222324
25262728293031