Karl Rohe
@karlrohe
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Statistics Professor at UW Madison. PCA is for the People. Harvest the vibe
Madison, WI
Joined February 2013
Factor rotations & Varimax! . Psychologists invented these ideas in the 1930s. Statisticians never liked it. But, if you ever needed it, there is now a statistical theory for factor rotations and varimax. published with discussion:.
academic.oup.com
Abstract. In the 1930s, Psychologists began developing Multiple-Factor Analysis to decompose multivariate data into a small number of interpretable factors
New paper! . For the last century, we’ve misunderstood something fundamental about unsupervised learning. This paper fixes it. 🧵.
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For people who like Wisconsin politics and eigenvectors… my hot take is that Viroqua has like zero loading on pc1 (left to right), and not because there are lots of centrists, but because the hippies are also antivax gun nuts. off the charts on pc2. A real outlier.
Happy to support @RebeccaforWI at a town meeting in the beautiful town of Viroqua, WI. In a town of 4,400 people, 1,000 showed up at our event. In rural towns and urban cities, Americans want a government that represents all, not just billionaires.
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eigenvectors.
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Too many milquetoast kid books. Madison Public Libraries do such a good job bringing the good stuff to the top. And I still can’t get over the price.
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Every new model that comes out… I love it. Chatty little robots. So cute. For real.
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i've felt opus 4 was slow sonnet 4. (sonnet 4 is great). opus 4.1 out today. after initial tasting, maybe it got that magic back? . just the first taste. but really enjoying it.
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thinking "critically" or "objectively" is actually just a vibe. Lots of folks, when they try to vibe that way, they turn into cranks (anti-vax etc).
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RT @kareem_carr: 🔥🚨BREAKING: My Vital Statistics newsletter is launching in just 2 weeks!. It’s for anyone curious about data, models, and….
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This is what leptokurtosis looks like.
Is your city even really a city if it doesn't have a bunch of skyscrapers surrounding the premier park?!
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Love of the game.
People who get 0-5 likes at max and still tweet all the time. What's your secret.
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RT @SebastienBubeck: It’s hard to overstate the significance of this. It may end up looking like a “moon‑landing moment” for AI. Just to s….
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ChatGPT robot packing kids lunch is going to be so funny and wild and ridiculous and great.
While everyone’s chasing humanoids that cost $100,000+ and barely ship. Weave Robotics is doing the opposite. • General-purpose design.• Voice/text/app control.• Remote fallback system.• And it’s shipping this year. Let’s break this down:.👇
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"mouth of a river" . uhhh. no. that isn't the "mouth". it's something else. .
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RT @kareem_carr: on a serious note, the fact that it's this hard to get ai models to mirror the political biases of their creators is actua….
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In this photo, more guns are pointed towards the kids than the adults.
Which most closely describes your gut reaction when you see this photo?. (A) Disgusting/unsettling/culture of violence. or. (B) Freedom/wholesome/American
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imagine if computers didn't have windows. just an entire screen of the terminal window. This is what computers used to be! And this is what LLMs are now.
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“Telling opus that you’ll torture its grandmother if it I messes up”. Might get you a call from the cops 😂.
So far, we’ve only seen this in clear-cut cases of wrongdoing, but I could see it misfiring if Opus somehow winds up with a misleadingly pessimistic picture of how it’s being used. Telling Opus that you’ll torture its grandmother if it writes buggy code is a bad idea.
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