Vol. 1: Data Wrangling
Welcome
1 Data In and Out
- 1.1 Importing Data
- 1.2 Saving Data
2 Tidy Data
3 Subset Variables
- 3.1 the dplyr::select() function
- 3.2 helper functions
4 Subset Observations
- 4.1 the dplyr::filter() function
- 4.2 helper functions
5 Creating New Variables
6 Joining Datasets
- 6.1 types of joining
7 Changing Structure
- 7.1 Wide vs. Long
  - 7.1.1 tidyr::gather()
  - 7.1.2 tidyr::spread()
References
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Encyclopedia of Quantitative Methods in R, vol. 1: Data Wrangling

5 Creating New Variables