Thom Volker
@thomvolker.bsky.social
220 followers 230 following 330 posts
PhD Candidate in Statistics, Utrecht University Creates fake data for a living. thomvolker.github.io
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Reposted by Thom Volker
thomvolker.bsky.social
Cool stuff!

Florian van Leeuwen and I implemented a prediction function in the #mice package that allows the incorporation of missing data uncertainty in a prediction interval.

The `predict_mi()` function is available in the current development version: github.com/amices/mice

#Rstats #statsky
Image of R code. To reproduce:

library(ggplot2)
library(dplyr)

library(mice, warn.conflicts = FALSE)
 
imp <- mice(nhanes, m = 5, maxit = 5, seed = 1, 
            ignore = rep(c(FALSE, TRUE), c(20, 5)), 
            print = FALSE)
 
impdats <- complete(imp, "all")
 
train <- lapply(impdats, function(dat) subset(dat, !imp$ignore))
test <- lapply(impdats, function(dat) subset(dat, imp$ignore))
 
fits <- lapply(train, function(dat) lm(age ~ bmi + hyp + chl, data = dat))
preds <- predict_mi(object = fits, newdata = test, pool = TRUE, interval = "prediction")
 
preds
 
preds %>% 
  as.data.frame() %>% 
  mutate(case = 1:nrow(preds),
         y = test[[1]]$age) %>% 
  ggplot(aes(x = fit, y = case, col = rowSums(is.na(nhanes[imp$ignore,]))>0)) +
  geom_point() +
  geom_errorbar(aes(xmin = lwr, xmax = upr)) +
  theme_minimal() +
  scale_color_manual(values = mice::mdc(1:2), labels = c("observed", "missing")) +
  theme(legend.title = element_blank(),
        legend.position = "bottom") +
  labs(x = "prediction",
       title = "Pooled prediction intervals")
Reposted by Thom Volker
jessicahullman.bsky.social
Looking forward to talking about our work on the value of explanation for decision-making at this workshop
thomvolker.bsky.social
Both can hold simultaneously? But it's Dutch indeed!
Reposted by Thom Volker
klauspforr.bsky.social
"emerging literature" == i presented once at a conference
"recent research" == two papers and one blog post
"research tradition" == everything in my zotero folder
At least, that's what I was told
thomvolker.bsky.social
For all things related to R, I find it as intuitive as RStudio, with the addition that it's very easy to mix in python when needed. There are quite some handy tricks implemented, like the thing with color codes or creating github issues from "TODO"s in markdown in a single click.
Reposted by Thom Volker
andrew.heiss.phd
Click on the title of the picker and it’ll switch between hex, RGB, and HSL!
thomvolker.bsky.social
How cool is this?! Positron opens a HTML color picker when typing a HTML color in your script.

#RStats #dataviz
Reposted by Thom Volker
adrianweckler.bsky.social
“Littered with errors including three nonexistent academic references and a made-up quote from a Federal Court judgement.”

Deloitte issues refund to (Aus) government for using AI in $440k report
thomvolker.bsky.social
No pets for you I guess?
thomvolker.bsky.social
Die gelijkenis is inderdaad treffend!
thomvolker.bsky.social
DOGE got nothing on this.
thomvolker.bsky.social
Ja, ik denk dat dat, verdrietig genoeg, inderdaad is wat veel mannen willen. Het onderstaande fragment maakt een vergelijkbaar punt. Bizar dat de emancipatie eerder achteruit gaat dan verbetert.
ebharrington.bsky.social
This is perhaps the ultimate expression of the phenomenon feminist theorist Marilyn Frye described 50yrs ago: that many self-proclaimed heterosexual men neither like nor desire women.
This is why the bros invented RealDolls & now AI "actresses:" they want femininity, not human beings who are women.
Reposted by Thom Volker
joppe.bsky.social
Meneer die denkt dat iedereen z'n profielfoto in hoge resolutie wilt om boven hun bed te hangen noemt 250.000 andere mensen een narcist.
thomvolker.bsky.social
Ik vraag me altijd vooral af of deze mannen een partner willen of een soort assistent die het huishouden runt
Reposted by Thom Volker
groenlinks-pvda.bsky.social
Wij zéggen niet alleen dat we wonen prioriteit maken, we investeren er groot in.

We nemen het heft in eigen hand, doorbreken de stilstand en we gaan bouwen voor de sociale meerderheid.

We hebben dit eerder gedaan. En we kunnen het opnieuw.

#SamenVooruit
thomvolker.bsky.social
On LLM's
oxinabox.bsky.social
"it might be conscious but unable to express it! You can't know."
O-kay... That sounds like you are trying to argue for existence of a soul. Why have you never argued this for animals or other objects that didn't have multibillion dollar marketing campaigns?
Reposted by Thom Volker
Reposted by Thom Volker
wonkish.bsky.social
Interesting use of the passive voice you've got there, CNN..
Angry goose meme where in the first panel the goose says "“Adults and children alike were pulled from their Chicago apartments" then in the second panel the goose is chasing the person angrily saying "WHO PULLED THEM, CNN?".
Reposted by Thom Volker
ftm.nl
De Nederlandse rechtspraak lijkt onafhankelijk, maar achter de schermen heeft de minister van Justitie opvallend veel macht. En dat is een gevaarlijke kwetsbaarheid in ons systeem, waarschuwt hoogleraar en advocaat Jonathan Soeharno in gesprek met FTM. www.ftm.nl/artikelen/on...
Onze rechtsstaat is niet op het gevaar van autocratie voorbereid, zegt deze hoogleraar rechtspleging
Hoogleraar rechtspleging Jonathan Soeharno maakt zich grote zorgen over de rechtspraak in Nederland. Zo heeft de minister van Justitie en Veiligheid veel te veel macht bij benoemingen en neemt het ver...
www.ftm.nl
thomvolker.bsky.social
Well, this constrains my ideas substantially already
Reposted by Thom Volker
andrew.heiss.phd
If you've ever wanted to learn how to make beautiful websites with #QuartoPub and #rstats , check out this workshop I'm giving in a couple weeks! It'll be a blast (and we're covering Quarto's brand new _brand dot yaml system!)
stathorizons.bsky.social
Learn to create and publish a professional, data-focused website in “Create an Online Presence with Quarto Websites” on October 16-17, with @andrew.heiss.phd‬! Discover how to use #Quarto to build a variety of websites like personal portfolios, research compendiums, and interactive dashboards.
Quarto Websites | Online Seminar | Code Horizons
This online course taught by Andrew Heiss, Ph.D., teaches you how to use Quarto to build a variety of data-focused websites.
codehorizons.com
Reposted by Thom Volker
ebharrington.bsky.social
This is perhaps the ultimate expression of the phenomenon feminist theorist Marilyn Frye described 50yrs ago: that many self-proclaimed heterosexual men neither like nor desire women.
This is why the bros invented RealDolls & now AI "actresses:" they want femininity, not human beings who are women.