Cracking open ggplot internals with {ggtrace}
summary
Package ggtrace exposes ggplot2 internals so users can snapshot and modify the layer data frames at concrete points in the pipeline. It provides functions like ggtrace_inspect_args() and ggtrace_inspect_return() to capture the Before Stat, After Stat, Before Geom and After Scale states, lets code insert a stage() mapping to keep y present for stat_boxplot and geom_label, and demonstrates a working solution that debugs and adds a label for the upper whisker of the second box plot.
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chapters (9)
- 0:00Start
- 4:07ggplot internals as data wrangling
- 4:55Layers as dataframes
- 10:21Walkthrough with a barplot
- 12:26After Stat
- 13:19Before Geom
- 17:31Multiple mappings with stage()
- 17:57ggplot internals for users
- 18:40Capture workflow
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