how about "projection onto the vector space spanned by the columns of the data"

{gm} - Create music with R: flujoo.github.io/gm/

#RStats bookmark from old twitter

This is arguably somewhat a team effect, since different teams will have different reports on what pitches to throw to whom (which the catchers use)

Would be interesting to see if this effect persists even if a catchers switches teams

The 2026 Big Data Bowl #BigDataBowl is live!

Participants can sign up for two competitions:
- leaderboard
- traditional analytics competition

This year's task: predict/understand player movement when the ball is in the air

running mcmc satisfies my dopamine cravings

60 home runs for Cal Raleigh. Incredible.

Why did Luis García Jr. get fooled so badly on this pitch?

In my article representation of my SaberSeminar presentation, I answer just that and explain how visual uncertainty influences pitch tracking and helps to explain swings.

Link below.
www.mlb.com/video/luis-g...

I don't think it will make *that* much of a difference because the normal approximation to everything is good enough, but this is definitely more flexible and rigorous!

Working on a "generalized" version of dynamic dead zone (DDZ) that doesn't require any assumptions about the variables' distributions. You only need to specify the covariance structure, which is Gaussian for the sake of convenience:

Every so often we check in on the models

Induced vertical break, spin efficiency, seam-shifted wake—what do these buzzwords mean for a pitch trajectory? Explore using my Statcast-based pitch visualizer (physics modeling based on work of @pobguy.bsky.social). Updated daily with new pitching data!

gabes135.github.io/pitch-graphic/

Cal Ripken Jr has missed 3,765 consecutive games

Happy birthday Ben!

Alright, I've tidied up the repo and added my presentation. Thank you to everyone who was at @saberseminar.bsky.social yesterday! Was a pleasure to meet so many bright and interesting people.

github.com/justinochoi/...

You don't truly appreciate how fast Korea's wifi is until you're standing in an endless line for border control at O'Hare

Are the expected movement distributions a mixture of gaussians, one for each pitch type?

I really enjoyed chatting with Hannah about the ups and downs of working in baseball -- and my decision to not do that anymore.

carly needs to give us everything in the vault, six is not enough

Welp, here’s the dumbest #BoothViews I’ve ever done. Here’s how it played out as my voice gave out ending today’s broadcast 🫠😂 glad Bulldog got a kick out of it!

America needs one of those language authorities like the French have so every person who spells it “woah” is immediately arrested.

During grad school, I sent actual letters through the actual mail to five GMs, asking how a 25-year-old with an MFA in poetry and no other credentials could get involved in baseball. Only one responded, and the answer was some (polite) version of, "I regret to inform you that your dream is doomed."

Slightly diminish a band

The Lice

Watching baseball @jonbois.bsky.social

Coming soon to a saberseminar near you: hydrogen bomb vs. coughing baby