hadley

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Hadley Wickham hadley

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Chief Scientist at @posit-pbc

26.4k followers · 0 following

@posit-pbc
Houston, TX
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https://hadley.nz
@hadley.nz

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tidyverse/dplyr Public

dplyr: A grammar of data manipulation

R 4.9k 2.1k
tidyverse/tidyverse Public

Easily install and load packages from the tidyverse

R 1.8k 293
r4ds Public

R for data science: a book

R 4.9k 4.4k
r-lib/devtools Public

Tools to make an R developer's life easier

R 2.5k 765
adv-r Public

Advanced R: a book

TeX 2.4k 1.7k
tidyverse/ellmer Public

Call LLM APIs from R

R 546 103

5,064 contributions in the last year

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Activity overview

Contributed to tidyverse/ellmer, hadley/cran-deadlines, r-lib/testthat and 387 other repositories

Contribution activity

October 2025

Created 211 commits in 25 repositories

Created 19 repositories

hadley/psycModel R
This contribution was made on Oct 27
hadley/testex R
This contribution was made on Oct 7
hadley/TrialEmulation R
This contribution was made on Oct 7
hadley/threshr R
This contribution was made on Oct 7
hadley/scrutiny R
This contribution was made on Oct 7
hadley/sassy R
This contribution was made on Oct 7
hadley/rtables R
This contribution was made on Oct 7
hadley/rmdl R
This contribution was made on Oct 7
hadley/phyloraster R
This contribution was made on Oct 7
hadley/imager C++
This contribution was made on Oct 7
hadley/idiolect R
This contribution was made on Oct 7
hadley/gtfs2gps R
This contribution was made on Oct 7
hadley/clinUtils R
This contribution was made on Oct 7
hadley/vein R
This contribution was made on Oct 1
hadley/prism R
This contribution was made on Oct 1
hadley/HurreconR R
This contribution was made on Oct 1
hadley/gips R
This contribution was made on Oct 1
hadley/ggseg R
This contribution was made on Oct 1
hadley/distances C++
This contribution was made on Oct 1

Created a pull request in r-lib/testthat that received 22 comments

Improved composition

expect_named() and expect_output() need to always return the input value, even if they use some subexpectation. To make this work, expectation comp…

+505 −422 lines changed • 22 comments

Opened 52 other pull requests in 19 repositories

tidyverse/ellmer 16 merged 3 open 1 closed

Deprecationapalooza
This contribution was made on Oct 23
Models bump 2025-10
This contribution was made on Oct 22
Improve provider hashing for batch_chat_*()
This contribution was made on Oct 22
Replace api_key with credentials
This contribution was made on Oct 21
Receive images from Google apis
This contribution was made on Oct 20
✨ Add ... to as_json ✨
This contribution was made on Oct 17
Add pricing variants
This contribution was made on Oct 16
Improve error handling for parallel_chat_*()
This contribution was made on Oct 16
Improve error handling in parallel_chat_structured()
This contribution was made on Oct 16
Describe the schema of a data frame
This contribution was made on Oct 15
Improvements to token API
This contribution was made on Oct 15
Let interpolate_package() work with dev packages
This contribution was made on Oct 15
Show content preview for Chat$get_tokens()
This contribution was made on Oct 14
✨ Add new type_ignore ✨
This contribution was made on Oct 14
Capture unknown content
This contribution was made on Oct 10
Allow batch and parallel functions to take chat specified as string
This contribution was made on Oct 9
Use minimal NSE in tool()
This contribution was made on Oct 9
Bring across useful claude tips from testthat
This contribution was made on Oct 9
Improve handling for nested objects
This contribution was made on Oct 8
Send structured data back to the LLM
This contribution was made on Oct 8

r-lib/testthat 11 merged 1 open

Advance deprecations
This contribution was made on Oct 27
Ensure that expect_snapshot() registers restart
This contribution was made on Oct 20
Also handle errors in try_again()
This contribution was made on Oct 8
Extract a reprex from a failing expectation
This contribution was made on Oct 8
Use correct paste0() argument
This contribution was made on Oct 7
expect_mapequal() needs to set tolerance
This contribution was made on Oct 7
Implement expect_all_equal() and friends
This contribution was made on Oct 6
Make labels more flexible
This contribution was made on Oct 6
Improve show_text()
This contribution was made on Oct 6
Apply check_vector() to evaluated value
This contribution was made on Oct 6
Revert expect_mapequal() changes
This contribution was made on Oct 6
Check expect() inputs
This contribution was made on Oct 6

tidyverse/tidyverse.org 2 open 1 merged

purrr 1.2.0
This contribution was made on Oct 27
stringr 1.6.0
This contribution was made on Oct 27
Build with GitHub pages
This contribution was made on Oct 14

r-lib/pkgdown 2 merged

Re-document
This contribution was made on Oct 20
✨ Proofread translations ✨
This contribution was made on Oct 16

fsavje/distances 1 open

Fixes for upcoming testthat 3.3.0 release
This contribution was made on Oct 1

ggseg/ggseg 1 open

Fix for upcoming testthat 3.3.0 release
This contribution was made on Oct 1

hurrecon-model/HurreconR 1 open

Fix for upcoming testthat 3.3.0 release
This contribution was made on Oct 1

nealrichardson/httptest2 1 open

Fix for upcoming testthat 3.3.0 release
This contribution was made on Oct 2

openanalytics/clinUtils 1 open

Fix for testthat 3.3.0
This contribution was made on Oct 7

ipeaGIT/gtfs2gps 1 merged

Fix for upcoming testthat 3.3.0 release
This contribution was made on Oct 7

andreanini/idiolect 1 merged

Fix for upcoming testthat 3.3.0 release
This contribution was made on Oct 7

asgr/imager 1 merged

Fix for upcoming testthat 3.3.0 release
This contribution was made on Oct 7

gabferreira/phyloraster 1 open

Fix for upcoming testthat 3.3.0 release
This contribution was made on Oct 7

shah-in-boots/rmdl 1 open

Fix for upcoming testthat 3.3.0 release
This contribution was made on Oct 7

insightsengineering/rtables 1 merged

Fix for upcoming testthat 3.3.0 release
This contribution was made on Oct 7

dbosak01/sassy 1 merged

Fix for upcoming testthat 3.3.0 release
This contribution was made on Oct 7

lhdjung/scrutiny 1 merged

Fix for upcoming testthat 3.3.0 release
This contribution was made on Oct 7

paulnorthrop/threshr 1 merged

Fix for upcoming testthat 3.3.0 release
This contribution was made on Oct 7

Causal-LDA/TrialEmulation 1 open

Fix for upcoming testthat 3.3.0 release
This contribution was made on Oct 7

Reviewed 42 pull requests in 8 repositories

tidyverse/ellmer 18 pull requests

Deprecate virtual_key argument in chat_portkey().
This contribution was made on Oct 27
feat: Support images and PDFs in tool results
This contribution was made on Oct 24
Improvements to token API
This contribution was made on Oct 23
Models bump 2025-10
This contribution was made on Oct 23
Implement openAI responses API
This contribution was made on Oct 22
add @duration slot to turns
This contribution was made on Oct 22
Improve error handling for parallel_chat_*()
This contribution was made on Oct 17
Support for Anthropic/Claude Files API
This contribution was made on Oct 16
Let interpolate_package() work with dev packages
This contribution was made on Oct 16
Describe the schema of a data frame
This contribution was made on Oct 16
✨ Add new type_ignore ✨
This contribution was made on Oct 14
Send structured data back to the LLM
This contribution was made on Oct 14
Allow batch and parallel functions to take chat specified as string
This contribution was made on Oct 10
Bring across useful claude tips from testthat
This contribution was made on Oct 10
fix(ellmer_prompt): Truncate lines and items individually
This contribution was made on Oct 9
Improve handling for nested objects
This contribution was made on Oct 9
Fix #754: remove hard-coded 1:2 column limit in chat.R
This contribution was made on Oct 2
fix(interpolate_package): Check path and improve error messages
This contribution was made on Oct 2

r-lib/testthat 7 pull requests

Ensure that expect_snapshot() registers restart
This contribution was made on Oct 21
make expect_lt() etc. work properly for non-numeric data
This contribution was made on Oct 20
Implement expect_disjoint()
This contribution was made on Oct 10
Improve show_text()
This contribution was made on Oct 9
Implement expect_all_equal() and friends
This contribution was made on Oct 8
Improved composition
This contribution was made on Oct 6
Incorporate doc feedback from @maelle
This contribution was made on Oct 2

tidyverse/dplyr 6 pull requests

Refresh na_if() and coalesce() docs
This contribution was made on Oct 23
Add .unmatched to case_when()
This contribution was made on Oct 10
Supersede case_match()
This contribution was made on Oct 10
Suggest recode_values() in the recode() docs
This contribution was made on Oct 10
Implement recode_values() and replace_values()
This contribution was made on Oct 7
Implement replace_when()
This contribution was made on Oct 7

r-lib/pkgdown 4 pull requests

Build documentation for LLMs
This contribution was made on Oct 20
Add release bullets for translations
This contribution was made on Oct 17
feat: put parentheses inside seealso links
This contribution was made on Oct 17
✨ Proofread translations ✨
This contribution was made on Oct 16

r-lib/lifecycle 4 pull requests

Deprecate signal_stage()
This contribution was made on Oct 3
Lazily generate lifecycle stage conditionMessage()
This contribution was made on Oct 3
Bypass signal() to avoid validation and cli related overhead
This contribution was made on Oct 3
Warn once per session, not once every 8 hours within a session
This contribution was made on Oct 3

r-dbi/DBI 1 pull request

OpenTelemetry Integration
This contribution was made on Oct 27

r-lib/httr2 1 pull request

Efficiency: promises method
This contribution was made on Oct 24

r-lib/vctrs 1 pull request

Improve on scalar object error
This contribution was made on Oct 14

Created an issue in posit-dev/positron that received 5 comments

Dataview histogram tooltip displays incorrect ranges

System details: Positron and OS details: Positron Version: 2025.11.0 build 27 Code - OSS Version: 1.103.0 Commit: 4a25175 Date: 2025-10-07T14:28:5…

5 comments

Opened 20 other issues in 11 repositories

tidyverse/ellmer 5 open 2 closed

Provide built-in web fetch tool
This contribution was made on Oct 27
Advance deprecations
This contribution was made on Oct 23
Figure out chat_openai_compatible() strategy
This contribution was made on Oct 22
Bump models
This contribution was made on Oct 22
Improve UI for long chats
This contribution was made on Oct 20
Add content type for citations
This contribution was made on Oct 8
Fallback content type
This contribution was made on Oct 6

r-lib/httr2 3 open

req_perform_parallel() doesn't return on double interrupt
This contribution was made on Oct 17
resps_responses() doc fixes
This contribution was made on Oct 16
Export resps_ok()
This contribution was made on Oct 16

r-lib/testthat 1 open 1 closed

Release testthat 3.3.0
This contribution was made on Oct 27
show_text() logic problem
This contribution was made on Oct 1

jasonmoy28/psycModel 1 open

Failure with upcoming stringr 1.6.0
This contribution was made on Oct 27

r-lib/pkgload 1 open

Should load_all() check versions of suggested packages too?
This contribution was made on Oct 27

r-lib/pkgdown 1 closed

Add translation todos to release bullets
This contribution was made on Oct 16

r-lib/usethis 1 open

Helper for common tidyverse GitHub setting
This contribution was made on Oct 9

dgkf/testex 1 closed

Failure with dev testthat
This contribution was made on Oct 7

r-lib/rlang 1 open

check_() shouldn't mention "primitive" functions
This contribution was made on Oct 6

atmoschem/vein 1 open

Failure with upcoming testthat 3.3.0
This contribution was made on Oct 1

ropensci/prism 1 open

Failure with dev testthat
This contribution was made on Oct 1