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Hadley Wickham

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Grammars of Data: lessons from ~20 years of the tidyverseSciPy 20262026-07-13
Twenty years of tidyverse work emphasizes concrete abstractions, tooling, and community practices: tidy data and the grammar of graphics remain useful; the…
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Making the most of artificial and human intelligence for data scienceposit::conf(2025)2025-09-16
Practical demos show using ellmer and chatlas to call LLMs from R/Python, register functions as tools, run code remotely and build agents that execute and…
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Updates from Positposit::conf(2024)2024-08-12
Posit frames its mission around open source tools and reports concrete progress: since 2019 over 300 people gain internal access to Posit Workbench, and…
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It's a Great Time to be an R Package Developer!posit::conf(2023)2023-09-17
R Packages gets a second edition and a practical claim: package development is easier and faster now — over 19,000 packages on CRAN (Mar 2023) and a one‑minute…
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Embracing multi-lingual data sciencePyData Global 20222022-12-01
Posit renames RStudio and ships concrete multilingual tooling: tidyverse code uses dplyr and ggplot2 to process 300,000 rows of flight data, computing speed…
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An introduction to R7rstudio::conf(2022)2022-07-25
R7 is a new OOP package (on GitHub, aiming for CRAN and core R) that combines S3 simplicity with S4 rigor: generics and methods implement a bizarro generic…
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RStudio: 2022 and Beyondrstudio::conf(2022)2022-07-25
Company claims a sustainable model funding open source scientific software by running a virtuous cycle: free packages feed commercial products that fund more…
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vctrs Tools for making size and type consistent functionsrstudio::conf 20192019-01-15
vctrs implements a consistent coercion system for vectors, including a stricter vec_c that throws errors instead of silently coercing, and a prototype…
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State of the Tidyverse 2020rstudio::conf 20192019-01-15
Tidyverse adoption continues to grow with cumulative downloads rising year over year and a published citation already hitting 17 citations in two months…
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Maintaining the house the tidyverse builtrstudio::conf 20192019-01-15
Code maintenance frames tidyverse work with a clear lifecycle and concrete promises: experimental, deprecated, stable, superseded guides when APIs may change…
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RStudio: 2022 and Beyondrstudio::conf 20192019-01-15
Company claims a sustainable model for funding open source scientific software and proves it by employing 43 full‑time open source engineers, ~40% of…
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An introduction to R7rstudio::conf 20192019-01-15
R7 is a new object system implemented as an R7 package on GitHub that aims to merge S3 simplicity with S4 rigor and eventually become part of R. It provides…
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What Makes a Good FunctionData Science Conference 4.02018-09-18
Argues that good functions avoid surprises and fail early by using clear type rules, showing surprising c() behavior where combining factors, dates, and NULLs…
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interviewed at – Hadley WickhamStrata Conference 20142014-02-11
ggvis turns ggplot2 into interactive web graphics by generating standard HTML/CSS/JavaScript pages so charts work in the browser and on iPads, aiming for…
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