Tidyverse library

Package tidyverse

Tidverse is a collection of R packages which we will be using intensively for the remainder of this course. If you haven’t installed tidyverse then you can do this with:

install.packages("tidyverse") # needed only once

and load it into R:

library(tidyverse) # each time you start RStudio

Something similar to the following will appear on your screen after loading tidyverse:

> library(tidyverse)
── Attaching packages ────────────────────────────────────────────────────────────────────── tidyverse 1.3.1 ──
✓ ggplot2 3.3.3     ✓ purrr   0.3.4
✓ tibble  3.1.2     ✓ dplyr   1.0.6
✓ tidyr   1.1.3     ✓ stringr 1.4.0
✓ readr   1.4.0     ✓ forcats 0.5.1
── Conflicts ───────────────────────────────────────────────────────────────────────── tidyverse_conflicts() ──
x dplyr::filter() masks stats::filter()
x dplyr::lag()    masks stats::lag()
>

It shows the sub-packages and the versions and also some conflicts.

⚠️You may ignore these Conflicts.

You now have access to an extensive set of functions for data manipulation and visualisation.

Outline

dplyr: Data transformation
- tibble : a two-dimensional data structure with rows and columns
- functions to manipulate tibble:
  - select : extract columns
  - filter : extract rows
  - mutate : add a new column
- pipe operator %>%
- summaries and sorting
- grouping
- queries
- join : combining tables
tidyr: Change the table layout
- pivot_longer : wide to long format
- pivot_wider : long to wide format

Tidyverse library

Package tidyverse

Outline

Links