Before we Start

  • This is not an introduction to R
  • Visualisation is a useful way of representing data
  • We are going to study diamonds!

Getting started

  • Plots in ggplot2 are build by adding layers

Further mapping

  • Data can be plottet as something other than position
  • Types of plots are determined by geom_functions

Different types of plots

  • Categorical data, aka factors can control the order of data in plots
  • ggplot makes it easy to make many different types of plots
  • ggplot have many useful extensions

Facetting

  • Facetting can make busy plots more understandable
  • Grid facetting in two dimensions allows us to plot even more variables

Scaling and coordinates

  • Pie charts are a bad idea!
  • Zooming might exclude data if done wrong
  • Play around to find the colours you like

Theming

  • EVERYTHING in the plot can be customized

Saving and exporting

Whats next?

  • ggplot2 is extensible - a LOT of extensions are available