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Fix minor typo #3114

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2 changes: 1 addition & 1 deletion vignettes/extending-ggplot2.Rmd
Original file line number Diff line number Diff line change
Expand Up @@ -61,7 +61,7 @@ StatChull <- ggproto("StatChull", Stat,
)
```

The two most important components are the `compute_group()` method (which does the computation), and the `required_aes` field, which lists which aesthetics must be present in order to for the stat to work.
The two most important components are the `compute_group()` method (which does the computation), and the `required_aes` field, which lists which aesthetics must be present in order for the stat to work.

Next we write a layer function. Unfortunately, due to an early design mistake I called these either `stat_()` or `geom_()`. A better decision would have been to call them `layer_()` functions: that's a more accurate description because every layer involves a stat _and_ a geom.

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