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Clarify why separate_wider_* live in tidyr

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Hadley Wickham 2022-11-09 12:47:28 -06:00
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regexps.qmd
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@ -247,8 +247,8 @@ These functions are naturally paired with `mutate()` when doing data cleaning.,
### Extract variables
The last function we'll discuss comes from tidyr: `separate_wider_regex()`.
It works like the `separate_wider_location()` and `separate_wider_delim()` functions that you learned about in @sec-string-columns but takes a vector of regular expressions rather than a vector of widths or a delimiter.
The last function we'll discuss uses regular expressions to extract data out of one column into one or more new columns: `separate_wider_regex()`.
It's a peer of the `separate_wider_location()` and `separate_wider_delim()` functions that you learned about in @sec-string-columns. These functions live in tidyr because the operates on (columns of) data frames, rather than individual vectors.
Let's create a simple dataset to show how it works.
Here we have some data derived from `babynames` where we have the name, gender, and age of a bunch of people in a rather weird format[^regexps-5]: