ggplot2: Quick Intro to the Grammar of Graphics - Three Basic Layers

ggplot2 is the de-facto standard for creating visualizations in R. It is based on the Grammar of Graphics - but what is meant by that? We'll take a quick look at the main ideas: How graphics are built up from layers of grammatical elements, and how variables are mapped onto aesthetics.

We focus on the three basic layers that are required for a valid plot: Data, Aesthetics, and Geometries, and provide a minimal code example.

Here you find the paper by Hadley Wickham, the creator of ggplot2:
A layered grammar of graphics
https://vita.had.co.nz/papers/layered...

The concept that Wickham implemented in ggplot2 is based on Leland Wilkinson's 1999 book "The Grammar of Graphics".

If you don't feel confident building up plots from scratch writing R code, you may want to check out my video about a graphical user interface that allows you to build up ggplot2 charts using a point-and-click interface, esquisse:
   • ggplot2 Made Easy: Drag and Drop via ...  

The code for the presentation (powered by xaringan and R Markdown) is here on my github profile:
https://github.com/fjodor/dataviz_ideas
ggplot2_Quick-Intro-Grammar.Rmd

Contact me, e. g. to discuss (online) R workshops / trainings / webinars:

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