Barrett | Lightnews

Malcolm 朝精 Barrett

@malcolmbarrett.malco.io

5.2K followers 750 following 650 posts

Ph.D., epidemiology. research software engineer @ Stanford Health Policy. living in Ann Arbor. open-source data science. causal inference. doing poems on aircrafts. approximately Bayesian. formerly Posit, Apple, AmeriCorps. 心を燃やせ。sic semper tyrannis. .. more

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Malcolm 朝精 Barrett @malcolmbarrett.malco.io · Jul 9

Link broke! Here is the current link: www.r-causal.org/chapters/04-...

Malcolm 朝精 Barrett @malcolmbarrett.malco.io · 18h

At least in Rmd/qmd, if you see output you have a sense it was run in a certain order. With Jupyter notebook output not even god knows the execution order

Malcolm 朝精 Barrett @malcolmbarrett.malco.io · 18h

If they can run line 50 before line 1 then we can have whiskey before 5

Malcolm 朝精 Barrett @malcolmbarrett.malco.io · 18h

You're underestimating just how little of a link there is between the order the code is written and the order the code was run interactively.

Reposted by Barrett

Obsidian @obsidian.md · 3d

You can now convert your Notion pages and databases to durable, private, local files.

Your data, offline, forever, for free.

Reposted by Barrett

Michael Friendly @datavisfriendly.bsky.social · 4d

#rstats Some packages include many datasets to illustrate the methods they provide, like my {heplots} and
{vcdExtra} pkgs.
I devised a scheme, using `@concept` tags to classify them according to the methods.
Perhaps this is useful to others

I describe what I did in this vignette: bit.ly/4oalgBd

Data sets in the heplots package

friendly.github.io

Malcolm 朝精 Barrett @malcolmbarrett.malco.io · 5d

the fact that they also need breakfast every day is just salt in the wound

Reposted by Barrett

Etienne Bacher @etiennebacher.bsky.social · 5d

#rstats Please welcome Jarl, a new R linter.

Jarl is a CLI tool with extensions in VS Code, Positron, and Zed. It can check thousands of lines of R code in milliseconds.

Jarl provides several output formats, a Github Actions workflow, and more.

Blog post: www.etiennebacher.com/posts/2025-1...

Reposted by Barrett

Jerry Chen @jcsalterego.bsky.social · 5d

ever since i was a little boy i always knew i wanted to be 38 years old writing short sentences on a website

Reposted by Barrett

Arthur Chatton @achatton.bsky.social · 6d

We have developed an algorithm for this purpose. See pubmed.ncbi.nlm.nih.gov/40856329/ for time-varying exposure based on www.degruyterbrill.com/document/doi... for time-fixed exposure.

Is Checking for Sequential Positivity Violations Getting You Down? Try sPoRT! - PubMed

The sPoRT algorithm provides interpretable subgroups violating the sequential positivity violation, allowing patterns and trends in the confounders to be easily identified. We finally provided practical implications and recommendations when positivity violations are identified.

pubmed.ncbi.nlm.nih.gov

Malcolm 朝精 Barrett @malcolmbarrett.malco.io · 7d

You’re a timerfluencer, Libby

A deal with a chess timer on a monitor stand

Reposted by Barrett, Julen Astigarraga

Jenny Bryan @jennybryan.bsky.social · 8d

I'm reminded of how handy the usethis::browse_*() functions are and thought I'd remind people they exist. Choose from a menu of links or go straight to CRAN or GitHub. #rstats

Screenshot showing usage of usethis::browse_package(), usethis::browse_cran(), and usethis::browse_github().

Reposted by Barrett

Michael Friendly @datavisfriendly.bsky.social · 9d

#rstats
🌈🌈 Do you ever need/want to print text in color in markdown/Quarto documents, so you can easily refer to red points or blue lines in a graph?
A start on this is in the {colorize} 📦, friendly.github.io/colorize/

Render Text in Color for Markdown/Quarto Documents

The colorize package provides some simple functions for printing text in color in markdown or Quarto documents, to be rendered as HTML or LaTeX. This is useful when writing about the use of colors in ...

friendly.github.io

Reposted by Paul Goldsmith-Pinkham, Barrett, Olúfẹ́mi Táíwò

Lillikoifish @lillikoifish.bsky.social · 9d

YOU GUYS WANNA SEE SOMETHING CURSED???? HOW ABOUT NEON GENESIS LEHIGH VALLEY PHANTOMS HOCKEY?????

Malcolm 朝精 Barrett @malcolmbarrett.malco.io · 9d

It's going to take America a generation to recover from what RFK has done to the skinny tie

Reposted by Barrett

Emily Riederer @emilyriederer.bsky.social · 9d

Continuing my #python Rgonomics posts for the #rstats crowd, wrote a short post about the different ways to use (non-polars) user-defined functions in a pipe

Not the most groundbreaking thing, but one of those "the thing I needed to read a bit ago" posts

(1/)

www.emilyriederer.com/post/py-rgo-...

Welcome! | Emily Riederer

www.emilyriederer.com

Reposted by Barrett

Al Sweigart @alsweigart.bsky.social · 10d

I made an ascii art moon phase tracker that runs whenever I open a new terminal window, and it makes me aware of the passage of time more than any calendar. github.com/asweigart/as... and github.com/asweigart/as...

Reposted by Barrett

David Keyes @dgkeyes.com · 13d

Post is up! #rstats

rfortherestofus.com/2025/11/quar...

Reposted by Barrett

tj mahr 🦃 @tjmahr.com · 13d

library(ggplot2)
library(mgcv)
ggplot(mtcars) +
aes(x = hp, y = disp) +
geom_point() +
stat_smooth(
aes(color = "vanilla gam"),
method = "gam"
) +
stat_smooth(
aes(color = "monotonic constraint"),
method = mgcv::scasm,
formula = y ~ s(x, bs = "sc", xt = c("m+"))
)

plot produced with the new scasm() model in ggplot2

Reposted by Barrett

Max kuhn @topepo.bsky.social · 13d

We're hiring an open-source #python developer focused on modeling APIs!

tidyverse.org/blog/2025/11...

#numpy #scipy #scikitlearn

Python Open-Source Developer

Posit is hiring a Python open-source developer to create more data analysis tools.

tidyverse.org

Reposted by Barrett, Darío Martin‐Benito

Gavin Simpson @gsimpson.bsky.social · 13d

A new release of the mgcv #RStats 📦 is out on CRAN and Simon Wood (U Edinburgh) has added some significant new features despite the small bump in version number:

🌟 scasm() for estimating GAMs with shape constrained smooths. Can be used with any family & smoothness selection is via the EFS method

Model is:

b3 <- scasm(
y ~ s(x0, bs = "bs", k= k) + s(x1, bs = "sc", xt = "m+", k = k) +
s(x2, bs = "bs", k = k) + s(x3, bs = "bs", k = k),
family=poisson, bs=200
)

The second smooth `s(x1) is a shape constrained smooth with a positive monotonicity constraint (xt = "m+").

The `bs = 200` arguments uses 200 boostrap samples, which generates bootstrap distributions for each coefficient in the model. These bootstrap samples respect the shape constraints, while the usual +/- 2 SE credible intervals may not.

The uncertainty in the partial effects is shown by two credible interval bands; a dark blue central band is a 68% Bayesian credible interval, while the lighter blue outer interval is a 95% Bayesian credible interval.

The background of each panel is light grey with white grid lines, in a similar style to ggplot2's default theme.

Reposted by Barrett, Ondřej Mottl

Shannon Pileggi @pipinghotdata.com · 14d

The recording of my #rstats posit::conf talk ✨ practical {renv}✨ is available! 🎉

I created this talk for frustrated {renv} users 🫠 and potential {renv} users🤩

youtu.be/l01u7Ue9pIQ?...

Even if {renv} isn't on your radar, you may still find this talk interesting if you are curious about🤔...

Practical {renv} (Shannon Pileggi, The PCCTC) | posit::conf(2025)

YouTube video by Posit PBC

youtu.be

Reposted by Barrett

Javier Orraca-Deatcu @javierorracadeatcu.bsky.social · 15d

Found this on LinkedIn but truer words never spoken. Stop the Python project "dependency hell" and make the switch to Python's {uv} framework. Here's a great YouTube video that really resonated with me being an R first dev... From Posit's Julia Silge: youtu.be/pMVYl9fx1EE

Malcolm 朝精 Barrett @malcolmbarrett.malco.io · 15d

I’m pretty sure that’s what is happening for me too so will try! Thanks!!

Reposted by Barrett

Tyler King @tyleraking.com · 16d

You can even send a free fax to your Senators to tell them to HOLD THE LINE.

Fax Senators

FaxZero lets you send free faxes to your senators with no subscription or sign-up.

faxzero.com

Reposted by Barrett, Paul Nightingale

Julia Silge @juliasilge.com · 17d

My talk from posit::conf earlier this fall on getting unstuck with #Python is now available to watch!

- Ten years ago, I attempted to learn Python and it went EXTRMELY badly 😩
- I am really happy that so much tooling in this area has improved SO much since then 😌

youtu.be/pMVYl9fx1EE

How I got unstuck with Python (Julia Silge, Posit) | posit::conf(2025)

YouTube video by Posit PBC

youtu.be

Reposted by Barrett

Libby Heeren @libbyheeren.bsky.social · 18d

Dr. Cat Hicks (@grimalkina.bsky.social) gave one of my very favorite keynotes of all time at #positconf this year 🥹 It really made my heart glow, and now that all the conf talks are on YouTube, you can watch it even if you missed conf!! #databs #rstats #python

www.youtube.com/watch?v=B-bM...