Davis Vaughan

Behind the scenes of tidyverse development: new dplyr functions | Davis Vaughan | Data Science Lab

The Data Science Lab is a live weekly call. Register at pos.it/dslab! Discord invites go out each week on lives calls. We’d love to have you! The Lab is an open, messy space for learning and asking questions. Think of it like pair coding with a friend or two. Learn something new, and share what you know to help others grow. On this call, Libby Heeren is joined by Davis Vaughan, Positron and tidyverse dev, who walks through the newest functions in dplyr, the problems they solve, how decisions are made to add or replace functions, and how community-driven development drives the tidyverse (and how wife-driven development drives Davis!). Hosting crew from Posit: Libby Heeren, Isabella Velasquez, Davis Vaughan Davis’s Bluesky: https://bsky.app/profile/davisvaughan.bsky.social Davis’s LinkedIn: https://www.linkedin.com/in/davis-vaughan/ Davis’s GitHub: https://github.com/DavisVaughan Resources mentioned in the video and chat: Tidyverse (R package collection) → https://www.tidyverse.org dplyr (R package) → https://dplyr.tidyverse.org tidyr (R package) → https://tidyr.tidyverse.org Air (R formatter) → https://github.com/DavisVaughan/air Tidy-ups (Tidyverse GitHub Repo) → https://github.com/tidyverse/tidyups Python Enhancement Proposals (PEPs) → https://peps.python.org dbplyr (R package) → https://dbplyr.tidyverse.org Lifecycle meanings → clock (R package) → https://clock.r-lib.org Advanced R (Book by Hadley Wickham) → https://adv-r.hadley.nz duckplyr (R package) → https://duckplyr.tidyverse.org R devel notes about %notin% being added to R natively soon → https://stat.ethz.ch/R-manual/R-devel/doc/html/NEWS.html ► Subscribe to Our Channel Here: https://bit.ly/2TzgcOu Follow Us Here: Website: https://www.posit.co Hangout: https://pos.it/dsh The Lab: https://pos.it/dslab LinkedIn: https://www.linkedin.com/company/posit-software Bluesky: https://bsky.app/profile/posit.co Thanks for hanging out with us! Timestamps of Questions / Topics: 00:00 Introduction 02:01 Demo of why we needed the new recode_values function and what it does 08:49 “What all was going on behind the scenes that came together for you to say… it’s definitely time to take action?” 10:19 Demo showing how to thumbs-up an issue on GitHub 11:55 “Could you show us how packages like dplyr are created” 12:31 “So if we have a data dictionary, we could use recode_values with across() to apply the right values to the right question?” 14:07 “Why dplyr 1.2 as opposed to 2.0?” 15:15 “Can you talk a little bit about what a tidyup means?” 19:08 Demo of filter_out 23:51 “I didn’t catch that anonymous formula notation in the last shared screen. What was that for?” 24:32 “What’s the difference between a comma and an and?” 26:17 “Did Libby say wife-driven development?!” (She did) 29:08 “Thoughts on incorporating the power of dplyr into Snowflake pipelines for data transformations.” 30:58 Explaining the anonymous notation and what.x means 33:48 “Can we touch on deprecation?” and the difference between deprecating and superseding 39:03 “Is there an internal rule of thumb on how long before something goes from experimental to stable?” 40:10 “Why would we need a replace_values?” (and replace_values demo) 40:35 “How often do you have these wife-driven coding moments?” 41:17 “What exactly is a gist?” (feel free to roast Libby for how she says gist) 46:58 “Is there a list of packages or functions that are going to be archived so I can get a little bit more lead time if this ever happens again?” 49:02 “Could coalesce() be used on multiple columns?” 50:42 “Why do I keep seeing this dot dot dot as an argument option and what does that mean?” 54:22 “Any chance of duckplyr going mainstream and included in dplyr?”

Davis Vaughan, Hadley Wickham

Open source development practices | Isabel Zimmerman & Davis Vaughan | Data Science Hangout

ADD THE DATA SCIENCE HANGOUT TO YOUR CALENDAR HERE: https://pos.it/dsh - All are welcome! We’d love to see you! We were recently joined by Isabel Zimmerman and Davis Vaughan, Software Engineers at Posit, to chat about the life of an open source developer, strategies for navigating complex codebases, and how to leverage AI in data science workflows. Plus, NERDY BOOKS! In this Hangout, we explore the differences between maintaining established ecosystems like the Tidyverse as well as building new tools like the Positron IDE. Davis and Isabel (and sometimes Libby ) share practical advice for developers, such as the utility of AI for writing tests and “rubber ducking”, and their various approaches to writing accessible documentation that bridges the expert-novice gap. Resources mentioned in the video and zoom chat: Positron IDE → https://posit.co/positron/ Air (R formatter) → https://posit-dev.github.io/air/ Python Packages Book (free) → https://py-pkgs.org/ R Packages Book (free) → https://r-pkgs.org/ DeepWiki (AI tool mentioned for docs) → https://deepwiki.com/tidyverse/vroom If you didn’t join live, one great discussion you missed from the zoom chat was about Brandon Sanderson’s Cosmere books and the debate between starting with Mistborn vs. The Stormlight Archive. Are you a Cosmere fan?! Which book did you start with? (Libby started with Elantris years before picking up Mistborn Era 1 book 1, but she’d now recommend maybe starting with Warbreaker!) ► Subscribe to Our Channel Here: https://bit.ly/2TzgcOu Follow Us Here: Website: https://www.posit.co Hangout: https://pos.it/dsh The Lab: https://pos.it/dslab LinkedIn: https://www.linkedin.com/company/posit-software Bluesky: https://bsky.app/profile/posit.co Thanks for hanging out with us! Timestamps: 00:00 Introduction 04:41 “What does a day in the life of an open source dev look like?” 09:43 “What got you into building your own R packages?” 13:00 “Personal tips for working with code bases you’re not familiar with?” 16:35 “How much of what you build is in R/Python vs. lower-level languages?” 19:57 “Does Air work inside code chunks in Positron?” 20:12 “Changing the Python Quarto formatter in Positron without an extension” 22:56 “What do your side projects look like?” 26:40 “How do you approach writing documentation?” 30:55 “What interesting trends in data science are you noticing?” 33:38 “How do you leverage AI in your work?” 37:30 “What are the hexes on Davis’s back wall?” 38:50 “What career advice would you give to someone in a similar position?” 43:45 “How can I be more resilient when things go wrong?” 47:59 “Do you have keyboard preferences?” 49:25 “What is the best way to report bugs in packages?” 50:56 “Open source dev work vs. in-house dev work” 51:50 “Tips for getting started with Positron”

Davis Vaughan, Isabel Zimmerman

Exploring Positron settings | Isabel Zimmerman & Davis Vaughan | Data Science Lab

The Data Science Lab is a live weekly call. Register at pos.it/dslab! Discord invites go out each week on lives calls. We’d love to have you! The Lab is an open, messy space for learning and asking questions. Think of it like pair coding with a friend or two. Learn something new, and share what you know to help others grow. On this call, Libby Heeren is joined by Posit engineers Isabel Zimmerman and Davis Vaughan as they share some of their favorite settings in Positron, a super customizable data science IDE. Come laugh with us as we can’t seem to figure out that VSCode calls rainbow parentheses “bracket pair colorization” Hosting crew from Posit: Libby Heeren, Isabella Velasquez, Daniel Chen, Isabel Zimmerman, Davis Vaughan Resources from the hosts and chat: Install Positron: https://positron.posit.co/ Positron docs on keyboard shortcuts: https://positron.posit.co/keyboard-shortcuts.html Nathan Jeffery’s “click to open a.RDS file” keybinding: https://nathan-jeffery.netlify.app/blog/2025-08-26-read-rds-positron/ Positron R pipe setting (paste in browser and it’ll open in Positron): positron://settings/positron.r.pipe One of Dan Chen’s faves, the native tab feature in VSCode + Positron: https://lucasprag.com/posts/underrated-vscode-feature-native-tabs/ The list of RStudio keybindings that you get when you turn on RStudio keybindings in Positron: https://positron.posit.co/migrate-rstudio-keybindings.html Indent rainbow extension: https://open-vsx.org/extension/oderwat/indent-rainbow Rainbow brackets setting (paste in browser and it’ll open in Positron): positron://settings/editor.bracketPairColorization.enabled Setting hierarchy (User vs Workspace settings) in Positron: https://code.visualstudio.com/docs/configure/settings#_settings-precedence Rainbow CSV extension (not by Posit): https://marketplace.visualstudio.com/items?itemName=mechatroner.rainbow-csv Positron +1ePositron, an extension pack for dev and data science, by Garrick Aden-Buie: https://open-vsx.org/extension/grrrck/positron-plus-1-e Publishing from VS Code or Positron: https://docs.posit.co/connect/user/publishing-positron-vscode/ Posit Connect Cloud plans: https://connect.posit.cloud/plans Enter Folder extension that Libby mentions: https://open-vsx.org/extension/xiangda/enter-folder Catppuccin themes (shared by Rory Lawless, and now some of Libby’s favorites!): https://open-vsx.org/extension/Catppuccin/catppuccin-vsc ► Subscribe to Our Channel Here: https://bit.ly/2TzgcOu Follow Us Here: Website: https://www.posit.co The Lab: https://pos.it/dslab Hangout: https://pos.it/dsh LinkedIn: https://www.linkedin.com/company/posit-software Bluesky: https://bsky.app/profile/posit.co Thanks for learning with us! Timestamps 00:00 Introduction 00:42 Guest Introductions: Isabel and Davis 02:41 Positron Settings overview 04:11 How to enable “Format on Save” 04:34 “How do I open settings in JSON or UI?” 05:10 Auto Save on focus change 08:26 Enabling RStudio key bindings 09:28 “Why doesn’t the cursor move with code edits?” 12:18 User vs. Workspace settings 14:34 Creating and using Profiles 16:13 “Can I use the magrittr pipe with Control+Shift+M?” 17:23 Searching and managing keyboard shortcuts 19:42 Creating custom code snippets 21:31 The Indent Rainbow extension 24:04 Enabling rainbow parenthesis/brackets 25:08 Managing Python and R interpreters 26:32 Rearranging and hiding UI panes 28:04 Rainbow CSV and favorite extensions 29:26 Using the Enter Folder extension 31:05 Understanding the setting hierarchy 32:48 Adding symbols to Quick Open search 36:00 “Is there a way to shift focus using keyboard shortcuts?” 38:04 Modifying keybindings JSON for specific languages 39:20 “How do you find trustworthy extensions?” 43:11 “How can I publish to shinyapps.io from Positron?” 44:03 Deploying with Posit Publisher and Connect Cloud 48:32 Customizing themes with RainGlow extension 50:36 “Is there an Import Data Set wizard in Positron?” 53:01 Conclusion and community resources

Davis Vaughan, Garrick Aden-Buie, Isabel Zimmerman

dplyr 1.1.0 Features You Can’t Live Without - posit::conf(2023)

Presented by Davis Vaughan Did you enjoy my clickbait title? Did it work? Either way, welcome! The dplyr 1.1.0 release included a number of new features, such as: Per-operation grouping with.by An overhaul to joins, including new inequality and rolling joins New consecutive_id() and case_match() helpers Significant performance improvements in arrange() Join me as we take a tour of this exciting dplyr update, and learn how to use these new features in your own work! Presented at Posit Conference, between Sept 19-20 2023, Learn more at posit.co/conference.# Talk Track: Lightning talks. Session Code: TALK-1162

Davis Vaughan