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Date	Title	Categories
February 3, 2026 at 9:44 AM	Week 3 tips and FAQs What’s the difference between statistical significance and substantial significance? Can we measure substantial significance with statistics? What are all the different ways we can look at model coefficients? How do I change the reference category for a categorical variable?	FAQs
January 28, 2026 at 4:24 PM	Week 2.5 tips and FAQs My p-values are showing up as 2.3e-7. What does that mean? Sometimes R says that my p-value is 0—is that correct? Is it okay to have tiny p-values? What’s the difference between the `\|>` and `%>%` pipes? Why do we sometimes combine code with `+` and sometimes with `\|>`? Why doesn’t `group_by(Species)` work but `group_by(species)` does? Why does `aes()` sometimes appear in `ggplot()` and sometimes in `geom_WHATEVER()`? Installing vs. using packages Why are my axis labels all crowded and on top of each other? How do I fix that? Why isn’t the example code using `data = whatever` and `mapping = aes()` in `ggplot()` anymore? Do we not have to use argument names? What’s the difference between `read_csv()` vs. `read.csv()`? What’s the difference between `facet_grid()` and `facet_wrap()`? Why do I sometimes see `facet_wrap(vars(blah))` and sometimes `facet_wrap(~ blah)`? What’s the difference between the `fill` and `color` aesthetics?	FAQs
January 28, 2026 at 11:52 AM	Making cleaner, nicer Quarto documents Render often Check for broken code chunks Check that your text looks okay Don’t install packages in your document Clean up warnings and messages Global chunk options Fancy document settings Chunk names	advice
January 28, 2026 at 1:35 AM	Weeks 1–2 tips and FAQs What is the tidyverse? Why do you keep writing package names in `{}`s? Why do you include `()`s after function names? What’s the difference between Source and Visual mode in the editor window? What’s the difference between R Markdown and Quarto? Why don’t I have options to render to PDF (or Word or HTML)? Rendered document format for iCollege What is this thing that we can render to? How does `group_by()` work? Why did we have to group by `island` and not `body_mass` and `island`? Do you have any tips for remembering all the different functions we’re learning? There are so many! My histogram bars are too wide / too narrow / not visible. How do I fix that?	FAQs
January 28, 2026 at 12:25 AM	Copy, paste, and tweak	advice
January 15, 2026 at 2:43 PM	Why do you use ✓s for grades?	FAQs
January 15, 2026 at 2:35 PM	LLM FAQs Will R ever be fully replaced by AI? Will you incorporate LLMs and AI prompting into the course in the future? Why won’t you incorporate LLMs and AI prompting into the course?	FAQs
January 12, 2026 at 9:57 AM	The 30-minute rule and how to ask for help The 30-minute rule Don’t suffer in silence! Use Discord in public Help us help you High resolution questions Unanswered questions Discord question etiquette Student appointments	advice
January 12, 2026 at 9:44 AM	First week of class!	getting started
January 5, 2026 at 2:05 PM	Building community Class community Online community	advice
January 5, 2026 at 2:02 PM	Important R stuff	getting started
January 5, 2026 at 1:26 PM	Announcements and updates	getting started
January 5, 2026 at 1:01 PM	Welcome to class!	getting started