11 Nettoyer ses données avec tidyr
The goal of tidyr is to help you create tidy data. Tidy data is data where:
- Each variable is a column; each column is a variable.
- Each observation is a row; each row is an observation.
- Each value is a cell; each cell is a single value.
11.1 tibble
11.2 pivot_longer/pivot_wider
11.3 separate/unite
11.4 expand
better expand.grid