Here for data, data science, analytics engineering, rstats, bookshttps://bsky.app/profile/emilyriederer.bsky.socialhttps://bsky.app/profile/emilyriederer.bsky.social/post/3mwubbn4jis24The eternal question in data is "what is the denominator" and man does Gemini make silly choices. Asked how common an injury is, one might assume I meant *in people* but am given two rates: - % of injury among all hamstring injuries - % of injury among those who have half of the injury 🤷‍♀️02 Oct 2026 01:54 +0000at://did:plc:atvgfvva2b3arhtwbzk42w4e/app.bsky.feed.post/3mwubbn4jis24https://bsky.app/profile/emilyriederer.bsky.social/post/3mwskbkfllk2vThis but for all ideas. Shocking how many can fit in a 300-char post (or a pumpkin!) if you put your mind to the key idea. [contains quote post or other embedded content]01 Oct 2026 09:29 +0000at://did:plc:atvgfvva2b3arhtwbzk42w4e/app.bsky.feed.post/3mwskbkfllk2vhttps://bsky.app/profile/emilyriederer.bsky.social/post/3mwrehfj4i225Apparently I talk about knowing “what good looks like” too much because I started to say this today and my team finished my sentence 😳 That said, so glad to have “grown up” when #rstats was all about talking about tacit knowledge and workflows and the joy of setting things up nicely [contains quote post or other embedded content]30 Sep 2026 22:13 +0000at://did:plc:atvgfvva2b3arhtwbzk42w4e/app.bsky.feed.post/3mwrehfj4i225https://bsky.app/profile/emilyriederer.bsky.social/post/3mwlhcmenrc2uHad so much fun chatting with @lucystats.bsky.social and @sarahlotspeich.bsky.social about gnarly real world data wrangling — from elections to EHRs and beyond! Show link below! Meanwhile, I’m live-posting of my latest civic data eng sidequests here https://bsky.app/profile/emilyriederer.bsky.social/post/3munrhupr2c2i [contains quote post or other embedded content]28 Sep 2026 13:48 +0000at://did:plc:atvgfvva2b3arhtwbzk42w4e/app.bsky.feed.post/3mwlhcmenrc2uhttps://bsky.app/profile/emilyriederer.bsky.social/post/3mwlgu5c7dk2uYes, I would judge you for bringing iced coffee to an interview. But only because diluting previously hot brewed coffee with ice cubes is definitionally weak. Bring cold brew to show me you understand good things take time and are worth upfront investment. That’s a builder mindset28 Sep 2026 13:40 +0000at://did:plc:atvgfvva2b3arhtwbzk42w4e/app.bsky.feed.post/3mwlgu5c7dk2uhttps://bsky.app/profile/emilyriederer.bsky.social/post/3mwjijjmq6k27CFP for @causalscience.org closes on Wed! Selfish reminder to submit so I can watch your talk 🍿 Also remember to register; always closes before conf! IMHO everything you need to know about any flavor of DS can be learned from causal thinking (One day I will finish my drafted post on this... 🤦‍♀️) 1/ [contains quote post or other embedded content]27 Sep 2026 19:04 +0000at://did:plc:atvgfvva2b3arhtwbzk42w4e/app.bsky.feed.post/3mwjijjmq6k27https://bsky.app/profile/emilyriederer.bsky.social/post/3mwh6you35s2lThere's something really beautiful about canonical mathematical models or analytical frameworks (L-V in diffeq, epi study designs, etc.) Just a testament the extent to which all our x-discipline problems are the same at some level of abstraction and the power of taxonomizing / naming them [contains quote post or other embedded content]26 Sep 2026 21:08 +0000at://did:plc:atvgfvva2b3arhtwbzk42w4e/app.bsky.feed.post/3mwh6you35s2lhttps://bsky.app/profile/emilyriederer.bsky.social/post/3mwen5cqhb22iUsually vote by mail but changed things up this year to be in the first ~350k midterm voters! [contains quote post or other embedded content]25 Sep 2026 20:43 +0000at://did:plc:atvgfvva2b3arhtwbzk42w4e/app.bsky.feed.post/3mwen5cqhb22ihttps://bsky.app/profile/emilyriederer.bsky.social/post/3mwbbuiia6c2uNever going to look at NYT election data the same was again after hearing @christinezhang.bsky.social ‘s awesome @posit.co ::conf keynote! She discussed all the diff viz they considered to capture the plethora of sources of uncertainty in polling data (Also the needle and election night plots!) [contains quote post or other embedded content]24 Sep 2026 12:44 +0000at://did:plc:atvgfvva2b3arhtwbzk42w4e/app.bsky.feed.post/3mwbbuiia6c2uhttps://bsky.app/profile/emilyriederer.bsky.social/post/3mw2ozogiqs2lEvery year -- this is like the advent calendar of election day to me. Behold both democracy in action and a beautiful feat in data wrangling / harmonization [contains quote post or other embedded content]21 Sep 2026 21:51 +0000at://did:plc:atvgfvva2b3arhtwbzk42w4e/app.bsky.feed.post/3mw2ozogiqs2lhttps://bsky.app/profile/emilyriederer.bsky.social/post/3mvuuvq2pnc2mIncredibly sad and sorry to have missed everyone at posit::conf with a mind bending migraine which apparently was the harbinger of whatever bug has me down and out atm🤒. Grateful to the undeserved kindness of organizers and immense creativity of the lightning speakers who filled the gap 1/19 Sep 2026 14:20 +0000at://did:plc:atvgfvva2b3arhtwbzk42w4e/app.bsky.feed.post/3mvuuvq2pnc2mhttps://bsky.app/profile/emilyriederer.bsky.social/post/3mviglnohi22yLife advice but also good talk advice. The number of time I get stuck puzzling over, "I want to communicate xyz but what I'm saying isn't coming across" and the answer is "Well, just say xyz" is... a lot [contains quote post or other embedded content]14 Sep 2026 15:32 +0000at://did:plc:atvgfvva2b3arhtwbzk42w4e/app.bsky.feed.post/3mviglnohi22yhttps://bsky.app/profile/emilyriederer.bsky.social/post/3mvgy7u2sms2t"It's not this it's..." I'm a monster. Make it stop! [contains quote post or other embedded content]14 Sep 2026 01:42 +0000at://did:plc:atvgfvva2b3arhtwbzk42w4e/app.bsky.feed.post/3mvgy7u2sms2thttps://bsky.app/profile/emilyriederer.bsky.social/post/3mvgnh4lq2s2hAccidentally said “and that difference matters” unironically during talk prep and now I hate myself 🙊 Claudish is coming for us all13 Sep 2026 22:29 +0000at://did:plc:atvgfvva2b3arhtwbzk42w4e/app.bsky.feed.post/3mvgnh4lq2s2hhttps://bsky.app/profile/emilyriederer.bsky.social/post/3mvea6l2nuk2mInspired by this blog post, I was testing out how different LLMs perform `polars` tasks Gemini (Colab - I'm cheap what can I say) did NOT just convert to `pandas` to do a quantile instead of using a window function?! https://pola.rs/posts/llm-polars-patterns/12 Sep 2026 23:26 +0000at://did:plc:atvgfvva2b3arhtwbzk42w4e/app.bsky.feed.post/3mvea6l2nuk2mhttps://bsky.app/profile/emilyriederer.bsky.social/post/3mv634trivs2cWe could save years of education across data science and data engineering by just printing t-shirts that say "know what makes a row" [contains quote post or other embedded content]10 Sep 2026 12:40 +0000at://did:plc:atvgfvva2b3arhtwbzk42w4e/app.bsky.feed.post/3mv634trivs2chttps://bsky.app/profile/emilyriederer.bsky.social/post/3mv2gqsiwtc2ptech debt except calendar debt where you keep moving the one-on-ones thinking you'll be less busy tomorrow09 Sep 2026 01:57 +0000at://did:plc:atvgfvva2b3arhtwbzk42w4e/app.bsky.feed.post/3mv2gqsiwtc2phttps://bsky.app/profile/emilyriederer.bsky.social/post/3muzycxjbbs2uMajor shout out to @dalefrakes.bsky.social @jounihelske.bsky.social @tiddlydump.bsky.social and @rbly.bsky.social for the help! Bluesky lazyweb is alive and well 🙏 [contains quote post or other embedded content]08 Sep 2026 21:39 +0000at://did:plc:atvgfvva2b3arhtwbzk42w4e/app.bsky.feed.post/3muzycxjbbs2uhttps://bsky.app/profile/emilyriederer.bsky.social/post/3muwt6uxwp22lIt is surprisingly difficult* to find someone to whom the phrase "data generating process" is first attributed. Stats lazy web? *as in, I Googled it and was not in top hits. I have tried (almost) nothing and it isn't working!07 Sep 2026 15:29 +0000at://did:plc:atvgfvva2b3arhtwbzk42w4e/app.bsky.feed.post/3muwt6uxwp22lhttps://bsky.app/profile/emilyriederer.bsky.social/post/3munrhupr2c2iDoing some volunteer data eng work and their infra is... interesting (probably built by a series of random vols over time) 📊 Not pointing fingers, but sharing a running list of antipatterns for your amusement and as I keep track for a future thing I want to write up 🧵04 Sep 2026 01:05 +0000at://did:plc:atvgfvva2b3arhtwbzk42w4e/app.bsky.feed.post/3munrhupr2c2ihttps://bsky.app/profile/emilyriederer.bsky.social/post/3mul422vzuc2aCould not recall this quote. Thanks, Gemini, for "debunking" it for me. Really worried I was going to have to create a universe there...02 Sep 2026 23:36 +0000at://did:plc:atvgfvva2b3arhtwbzk42w4e/app.bsky.feed.post/3mul422vzuc2ahttps://bsky.app/profile/emilyriederer.bsky.social/post/3mul3nlbv5s2nFor no real reason, I was looking up something about the ancestry of causal DAGs in path diagrams and came across this picture. I got to see it so you do to. HT to Sewall Wright who both set the course for a very useful analytical tool but also took the time to include cute drawings of guinea pigs02 Sep 2026 23:29 +0000at://did:plc:atvgfvva2b3arhtwbzk42w4e/app.bsky.feed.post/3mul3nlbv5s2nhttps://bsky.app/profile/emilyriederer.bsky.social/post/3muiqutdcak2eJust occurred to me I don’t think I’ve ever seen a post I thought to be AI authored on Bluesky. Zero ways to monetize and zero clout from building a following here. Incentives are a magical thing02 Sep 2026 01:11 +0000at://did:plc:atvgfvva2b3arhtwbzk42w4e/app.bsky.feed.post/3muiqutdcak2ehttps://bsky.app/profile/emilyriederer.bsky.social/post/3muhzwm4hmc2vAppreciation post for the @dataelixir.com newsletter. Just saw it hop into my inbox and always a delight to read01 Sep 2026 18:20 +0000at://did:plc:atvgfvva2b3arhtwbzk42w4e/app.bsky.feed.post/3muhzwm4hmc2v