tj mahr 🤘
@tjmahr.com
data scientist studying how kids learn to speak, dad, jump roper, bayesian, tjmahr.com, Madison, WI
Pinned
tj mahr 🤘
@tjmahr.com
· Nov 14
readtextgrid now uses C++ (and ChatGPT helped)
Text parsing and thoughts about LLM-assisted R development
www.tjmahr.com
new #rstats blogpost: readtextgrid now uses C++ (and ChatGPT helped) www.tjmahr.com/readtextgrid...
Reposted by tj mahr 🤘
Clavicular just got dairygooned
February 10, 2026 at 2:58 AM
Clavicular just got dairygooned
Reposted by tj mahr 🤘
inconsistent file naming will be the death of me
February 10, 2026 at 10:49 AM
inconsistent file naming will be the death of me
i did a lower body workout on apple fitness on saturday. felt fine sunday. took my kid sledding on sunday and pulled her up the hill a dozen times. and my legs were very sore monday, especially walking up stairs. en.wikipedia.org/wiki/Delayed...
Delayed onset muscle soreness - Wikipedia
en.wikipedia.org
February 10, 2026 at 4:29 PM
i did a lower body workout on apple fitness on saturday. felt fine sunday. took my kid sledding on sunday and pulled her up the hill a dozen times. and my legs were very sore monday, especially walking up stairs. en.wikipedia.org/wiki/Delayed...
Reposted by tj mahr 🤘
Reposted by tj mahr 🤘
They just want to make everything worse. They want us to die from diseases that could eradicated. They want dirty food and air and water. They want increased child mortality. They want a more unsafe, disgusting, hateful world. And the corporate press is like “but that’s a valid perspective tho?”
A group of conservative activists has worked for 16 years to stop all government efforts to fight climate change. Their efforts are now paying off.
The EPA is expected to revoke the endangerment finding, which has underpinned the government’s ability to fight global warming since 2009.
The EPA is expected to revoke the endangerment finding, which has underpinned the government’s ability to fight global warming since 2009.
A Campaign to Revoke the Endangerment Finding Appears Near ‘Total Victory’
A small group of conservative activists has worked for 16 years to stop all government efforts to fight climate change. Their efforts seem poised to pay off.
nyti.ms
February 10, 2026 at 1:43 PM
They just want to make everything worse. They want us to die from diseases that could eradicated. They want dirty food and air and water. They want increased child mortality. They want a more unsafe, disgusting, hateful world. And the corporate press is like “but that’s a valid perspective tho?”
Reposted by tj mahr 🤘
A hallmark of conspiracy thinking is citing contradictory evidence with no coherent narrative.
If COVID emerged in summer 2019, then it also nukes the lab leak theory. Their best evidence is a few Wuhan Lab researchers getting sick in Nov. If the virus was already circulating, then it's irrelevant
If COVID emerged in summer 2019, then it also nukes the lab leak theory. Their best evidence is a few Wuhan Lab researchers getting sick in Nov. If the virus was already circulating, then it's irrelevant
February 10, 2026 at 3:27 PM
A hallmark of conspiracy thinking is citing contradictory evidence with no coherent narrative.
If COVID emerged in summer 2019, then it also nukes the lab leak theory. Their best evidence is a few Wuhan Lab researchers getting sick in Nov. If the virus was already circulating, then it's irrelevant
If COVID emerged in summer 2019, then it also nukes the lab leak theory. Their best evidence is a few Wuhan Lab researchers getting sick in Nov. If the virus was already circulating, then it's irrelevant
Reposted by tj mahr 🤘
Last week we released dplyr 1.2.0, but we left off something VERY important 🙂
`dplyr::if_else()` and `dplyr::case_when()` are now up to 30x faster and use 10x less memory!
We dive into how we achieved these numbers in this new #rstats post!
tidyverse.org/blog/2026/02...
`dplyr::if_else()` and `dplyr::case_when()` are now up to 30x faster and use 10x less memory!
We dive into how we achieved these numbers in this new #rstats post!
tidyverse.org/blog/2026/02...
`dplyr::if_else()` and `dplyr::case_when()` are up to 30x faster
dplyr 1.2.0 comes with much faster and more memory efficient `if_else()` and `case_when()` functions!
tidyverse.org
February 10, 2026 at 1:03 PM
Last week we released dplyr 1.2.0, but we left off something VERY important 🙂
`dplyr::if_else()` and `dplyr::case_when()` are now up to 30x faster and use 10x less memory!
We dive into how we achieved these numbers in this new #rstats post!
tidyverse.org/blog/2026/02...
`dplyr::if_else()` and `dplyr::case_when()` are now up to 30x faster and use 10x less memory!
We dive into how we achieved these numbers in this new #rstats post!
tidyverse.org/blog/2026/02...
Reposted by tj mahr 🤘
i can answer that for you. the cruelty of men deforms the world
November 15, 2024 at 10:44 PM
i can answer that for you. the cruelty of men deforms the world
Didn’t Italy just have the winter games? *checks* oh huh 20 years ago 🫠
February 10, 2026 at 12:47 AM
Didn’t Italy just have the winter games? *checks* oh huh 20 years ago 🫠
Reposted by tj mahr 🤘
#statstab #481 Getting over ANOVA: Estimation graphics for multi-group comparisons
Thoughts: Complex designs are harder to visualise, but with Estimation Statistics you get some perks over simple bar charts.
#design #estimationstatistics #ANOVA
www.biorxiv.org/content/10.6...
Thoughts: Complex designs are harder to visualise, but with Estimation Statistics you get some perks over simple bar charts.
#design #estimationstatistics #ANOVA
www.biorxiv.org/content/10.6...
February 9, 2026 at 8:02 PM
#statstab #481 Getting over ANOVA: Estimation graphics for multi-group comparisons
Thoughts: Complex designs are harder to visualise, but with Estimation Statistics you get some perks over simple bar charts.
#design #estimationstatistics #ANOVA
www.biorxiv.org/content/10.6...
Thoughts: Complex designs are harder to visualise, but with Estimation Statistics you get some perks over simple bar charts.
#design #estimationstatistics #ANOVA
www.biorxiv.org/content/10.6...
Reposted by tj mahr 🤘
“I’m mad I can’t understand Bad Bunny’s lyrics because they’re not in English”
my brother millions of metalheads around the world have been happily listening to incomprehensible Finnish shrieks and Japanese death grunts since we were teens, you’re just boring and racist
my brother millions of metalheads around the world have been happily listening to incomprehensible Finnish shrieks and Japanese death grunts since we were teens, you’re just boring and racist
February 9, 2026 at 5:46 AM
“I’m mad I can’t understand Bad Bunny’s lyrics because they’re not in English”
my brother millions of metalheads around the world have been happily listening to incomprehensible Finnish shrieks and Japanese death grunts since we were teens, you’re just boring and racist
my brother millions of metalheads around the world have been happily listening to incomprehensible Finnish shrieks and Japanese death grunts since we were teens, you’re just boring and racist
Reposted by tj mahr 🤘
You can’t have it both ways: report scores “adjusted for demographics” (which includes poverty), rank MS #1, and claim skeptics said “nothing can be done until poverty is addressed” The regression adjustment already addressed it.
(Also, tell me who said “nothing can be done.” Nobody, ever.)
(Also, tell me who said “nothing can be done.” Nobody, ever.)
Opinion | These Three Red States Are the Best Hope in Schooling
www.nytimes.com
February 9, 2026 at 11:03 AM
You can’t have it both ways: report scores “adjusted for demographics” (which includes poverty), rank MS #1, and claim skeptics said “nothing can be done until poverty is addressed” The regression adjustment already addressed it.
(Also, tell me who said “nothing can be done.” Nobody, ever.)
(Also, tell me who said “nothing can be done.” Nobody, ever.)
Reposted by tj mahr 🤘
Absolutely savage, I love it.
February 9, 2026 at 11:51 AM
Absolutely savage, I love it.
Reposted by tj mahr 🤘
Is there some sort of award for perfectly missing the point?
February 9, 2026 at 3:57 PM
Is there some sort of award for perfectly missing the point?
Reposted by tj mahr 🤘
When mentoring my students I am often surprised at how strong the pull is to find a statistically significant outcome. They seem deflated by null results even though I tell them how important it is in our science to have the full distribution of outcomes
February 9, 2026 at 1:03 PM
When mentoring my students I am often surprised at how strong the pull is to find a statistically significant outcome. They seem deflated by null results even though I tell them how important it is in our science to have the full distribution of outcomes
Reposted by tj mahr 🤘
Reposted by tj mahr 🤘
I'm convinced AI is our generation's radium - a discovery with genuinely useful applications in specific, controlled circumstances that we stupidly put in everything from kid's toys to toothpaste until we realised the harm far too late where future generations will ask if we were out of our minds.
February 8, 2026 at 10:23 PM
I'm convinced AI is our generation's radium - a discovery with genuinely useful applications in specific, controlled circumstances that we stupidly put in everything from kid's toys to toothpaste until we realised the harm far too late where future generations will ask if we were out of our minds.
Reposted by tj mahr 🤘
A Reddit user identifies the boy who took a Grammy from Bad Bunny in the halftime show as five-year-old model Lincoln Fox and says that he was meant to represent Bad Bunny as a child www.instagram.com/the_lincfox/... www.reddit.com/user/BabySea...
February 9, 2026 at 2:46 AM
A Reddit user identifies the boy who took a Grammy from Bad Bunny in the halftime show as five-year-old model Lincoln Fox and says that he was meant to represent Bad Bunny as a child www.instagram.com/the_lincfox/... www.reddit.com/user/BabySea...
Reposted by tj mahr 🤘
I'm hardly the first person to note this, but it's enormously instructive that our President and his followers saw the message "THE ONLY THING MORE POWERFUL THAN HATE IS LOVE" and understood it, correctly, as an attack on them
February 9, 2026 at 2:11 AM
I'm hardly the first person to note this, but it's enormously instructive that our President and his followers saw the message "THE ONLY THING MORE POWERFUL THAN HATE IS LOVE" and understood it, correctly, as an attack on them
Reposted by tj mahr 🤘
god, the insistence on regular everyday humanity throughout, the children, the elderly, the mamás, the community, always community. bad bunny is something bigger and better than a rockstar
February 9, 2026 at 1:39 AM
god, the insistence on regular everyday humanity throughout, the children, the elderly, the mamás, the community, always community. bad bunny is something bigger and better than a rockstar
you’re having the guy with the pot smoking podcast do a MAHA ad?
February 9, 2026 at 1:38 AM
you’re having the guy with the pot smoking podcast do a MAHA ad?
I need to know what that second to last song was
February 9, 2026 at 1:35 AM
I need to know what that second to last song was
wtf was that elevator accident ad
February 9, 2026 at 1:13 AM
wtf was that elevator accident ad
the coinbase ad was so good until it was coinbase
February 9, 2026 at 1:02 AM
the coinbase ad was so good until it was coinbase