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Felipe Fontana Vieira's posts

if anyone else has papers or projects that use rix, please let me know! in open source, people open issues to tell you when things don't work (which is fine) but sometimes, getting positive feedback is nice as well :D

9 hours ago 8 3 2 0
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Towards more reliable research: Today, together with @bihatcharite.bsky.social, we welcomed the 2025 #EinsteinFoundationAward winners: @simine.com, Maximilian Sprang, and the Brazilian Reproducibility Initiative @redebrrepro.bsky.social. A recording will be available soon.

1 day ago 20 9 2 0
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Do you struggle with missing data in your statistical analyses? Come join our Summer School "Solving Missing Data Problems in R"! We will tell you when you can safely use complete case analysis, and when more dedicated strategies are required!

utrechtsummerschool.nl/courses/data...

1 day ago 28 14 0 3
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Covariate-adjusted statistical dependence representation through partial copulas: bounds and new insights In this paper, we revisit the notion of partial copula, originally introduced to test conditional independence, highlighting its capability to represent the dependence between two random variables aft...

Normally, I don't share preprints, but this one originated out of a special friendship: arxiv.org/abs/2603.10941

Vinícius and I never met in person. We just happened to share an interest in copulas and causal inf. This preprint is the product of almost weekly meetings talking about such stuff.

2 days ago 19 5 2 1

Israel just attacked a university in Beirut, Lebanon, killing a dean and a researcher. Like it did in Gaza, where it systematically bombed all universities.

2 days ago 47 44 1 2

I didn’t know you were here! 😅

2 days ago 2 0 1 0

Getting the same results (~ 0.001/3 difference) in R of a simulation done in SAS around 1998 is probably the biggest achievement of my life so far

2 days ago 5 0 0 1

Tbh, this takes me back to 4 years ago when I was doing my masters in psych and reading such cases in blogs/books (e.g., 7 deadly sins of psych)

2 days ago 1 0 0 0

This one is new to me. The answers/replies to the questions are even more intriguing

2 days ago 4 0 2 0
GitHub - felipelfv/copula_project: Files for the manuscript submitted: Covariate-adjusted statistical dependence representation through partial copulas: bounds and new insights. Files for the manuscript submitted: Covariate-adjusted statistical dependence representation through partial copulas: bounds and new insights. - felipelfv/copula_project

Yup, github.com/felipelfv/co...

Please, let me know if you see any issues!

2 days ago 3 2 0 1
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I wonder what created that 0.0001 difference

2 days ago 0 0 1 0

Also, reproducible through rix @brodriguesco.bsky.social

2 days ago 4 1 2 0
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Covariate-adjusted statistical dependence representation through partial copulas: bounds and new insights In this paper, we revisit the notion of partial copula, originally introduced to test conditional independence, highlighting its capability to represent the dependence between two random variables aft...

Normally, I don't share preprints, but this one originated out of a special friendship: arxiv.org/abs/2603.10941

Vinícius and I never met in person. We just happened to share an interest in copulas and causal inf. This preprint is the product of almost weekly meetings talking about such stuff.

2 days ago 19 5 2 1

Vin\'icius Litvinoff Justus, Felipe Fontana Vieira: Covariate-adjusted statistical dependence representation through partial copulas: bounds and new insights https://arxiv.org/abs/2603.10941 https://arxiv.org/pdf/2603.10941 https://arxiv.org/html/2603.10941

2 days ago 1 1 0 0
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a woman wearing a hat and a white tank top has the word rage on her chest ALT: a woman wearing a hat and a white tank top has the word rage on her chest
1 week ago 1 0 0 0

Literally this morning, my gf: If you hadn't breathed so loud, I wouldn't have had a nightmare.

1 week ago 2 0 0 0

Fair 😆. The ones I just looked up:

- Maximum likelihood (ML) estimation (..) part 1, 2, and 3
- ML - Cramer Rao Lower Bound Intuition
- Least squares as ML estimator (two videos)

1 week ago 2 0 0 0

Matrix calculus sucks

1 week ago 0 0 1 0

Ben Lambert has some short videos!

1 week ago 1 0 1 0

I am increasingly getting comfortable with the idea that estimation and uncertainty quantification can be treated in quite different ways, which would once have been quite strange to me.

4 months ago 7 3 1 0

I'd love to read an essay by you on this topic.

When I took a similar path, I realized the toolkits were actually chasing different abstract quantities. "Probability," it turns out, has myriad meanings, even when it refers to the same data.

4 months ago 8 1 1 0

Tbh, it took me a few courses and around a year to realize that a lot of it boils down to regularization/optimization. There is always the "philosophical" (broadly speaking) avenue to it, which is were I guess most "heated" stuff comes up

1 week ago 2 0 0 0

Does anyone know an example (paper, blog post) where frequentist and Bayesian methods lead to different conclusions?

#rstats #stats

Or an anecdote that lead you to embrace one or the other approach?

1 week ago 44 7 14 1

Just received a mysterious e-mail inquiring whether the silkie bantam rooster is still available and to my disappointment, this apparently is not some sort of code word.
Looks like there's another Julia Rohrer in a different part of Germany who is selling chicken.

1 week ago 62 2 8 2

This 21st century Fontana is confident after creating fake data already

1 week ago 1 0 0 0

Much of expertise in psych. comes from supposedly “data-supported” conclusions. Yet a lot of it is quite sloppy and concerning. Plus, we generally agree that statisticians shouldn’t make claims about emotions, but suddenly we accept psychologists claiming big things achieved through statistics

1 week ago 1 0 1 0

Tbh, I should have said “research-oriented psychologists“ (still something very general though). I also definitely believe in collaboration. However, the problem I generally see and tried to target with my statement:

1 week ago 0 0 1 0

But I get your point!

1 week ago 1 0 0 0

In psychology, we have “normalised“ too much that we “teach students to be psychologists, not statisticians“.

1 week ago 1 0 2 0

There are many layers to this statement. I do see your point, despite disagreeing with it. What I am wondering though: one can teach statistics through SAS/JASP/SPSS, so what exactly draws you to something like R?

1 week ago 1 0 1 0
Felipe Fontana Vieira
Felipe Fontana Vieira
@felipefv
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