Introduction in R and RStudio

On the first course day (31st January) we will provide a short introduction into R and RStudio.

We will cover the following topics and functions:

• R and RStudio Installation

• R-Projects, RMarkdown and Quarto

  • How to use projects

  • How to set up an RMarkdown/Quarto File and its most important functions

• Install and load packages

  • install.packages()

  • library()

• Load and save data

  • read_csv()

  • write_csv()

• Data wrangling in tidyverse

  • mutate()

  • Filter and select data: filter(), select()

  • Change the data frame: as.factor(), pivot_longer(), pivot_wider(), relevel()

  • Create new variables based on conditions: case_when()

  • use pipes |>

• Summarize data

  • summarise()

• Data visualisation using the ggplot - package

  • choose an informative graph

  • mapping: aes()

  • geoms: geom_boxplot(), geom_violin(), …

  • change colors, shapes, labels & more

• Ressources for further learning