- Subsetting example walkthrough
- Apples to Oranges Data Organisation Challenge
- dplyr Video Tutorial and R Markdown document: An update to the plyr package, useful for subsetting, sorting, summarizing, and merging data using a more intuitive syntax than plyr or base R.
- Downloading files general advice
- Codebook sample
- Second Codebook sample
- Query string (and other fields-within-fields) unrolling
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