Nick HK Profile picture
Mar 24, 2019 10 tweets 4 min read Read on X
Very excited to say that my 📦#Rstats package📦 vtable is now available on CRAN, installable with install.packages('vtable')
vtable is a *variable browser* for R that helps you look at your data WHILE you're working on it. (thread/)
One thing I sorely miss in R, coming from Stata, is the ability to look through your variables while coding, without having to open it up directly or repeatedly call head(), str(), etc. None of those options work great anyway when you have lots of vars. Show me information!
So vtable(yourdataset) generates an informative table with information about all your variables (ranges, factor levels, classes...), and opens it up in RStudio Viewer (if in RStudio) or a browser window (if not). Heck, or save it to file as a piece of the data documentation.
Comes with plenty of bells n whistles. Add summary statistics with summ=, or have it tell you whether the variable has missing obs with missing=TRUE. Data titling and description (data.title, desc) for if you're building doc files.
Big ol' bonus: VARIABLE/VALUE LABELS. Notice last tweet it auto displayed the variable/value labels from efc? It will do that with labels coming from sjlabelled, haven, or Hmisc. This labeled Stata file was imported via haven. Plus, apply your own labels in one of 3 easy formats.
Not to mention, way easier to SEARCH variables. Want to find a given label, or a given factor level? You could try to remember which sjlabelled sub-function lets you do that & spend time on proper syntax, or just use vtable to open up a browser window and do Ctrl/cmd-F 🤷‍♀️
Very glad it's on CRAN now, and thanks to the reviewers for dealing with first-timer me. More information on options and the methods of using your own variable labels in the documentation or here: nickchk.com/vtable.html
Also, an intro video (done before it was on CRAN, so slightly outdates)
Enjoy!
One last thing: comes with the helper function dftoHTML which is really just intended to do some HTML preprocessing for vtable. But as a bonus, also allows you to have a copy of your data open without having to flip back and forth to the View tab.
Can be real handy if you find yourself needing to look back at the data a lot. And you can always subset/select before calling it (as with vtable too, of course) if you just want to look at a few variables. Ok now that's it, /fin.

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More from @nickchk

Dec 17
New working paper out today with Eleanor Murray, "Do LLMs Act as Repositories of Causal Knowledge?"

Can LLMs (like ChatGPT) build for us the causal models we need to identify an effect? There are reasons to expect they could. But can they? Well, not really, no.
Paper here:

Why might we expect LLMs could help with this task? At first blush you might expect this to require LLMs to have a real-world causal understanding of how the world works.arxiv.org/html/2412.1063…
But not really. If people have talked online about causal links, then the LLM could potentially just repeat that back. For example, LLMs do not need to be able to reason causally about the effect of hormone replacement therapy on cardiovascular health to determine that socioeconomic status (SES) is a confounder for this relationship, since it has access to research studies (Humphrey, Chan, and Sox 2002), and discussion of those studies (Catalogue of Bias Collaboration et al. 2018), that explain SES is a confounder in this context. So “socioeconomic status” becomes a statistically very likely continuation of the text “A good example of a confounder when studying the effects of hormone replacement therapy on ...
Read 12 tweets
Mar 30, 2023
Various thoughts on LLMs:

1. Exam performance is super interesting, but I think is misinterpreted. Exams are almost pure signal. They're not the actual thing you want to do, they're designed to be something that a *human* could only do if they could actually do the actual thing.
i.e. on a good exam, cost of performing well on the exam should drop sharply as your skill on the actual important thing improves.

Example: your ability to answer "what are the proper safety checks to run before letting a plane fly?" is easier for a good plane mechanic...
to answer than a bad one. But for an LLM that cost function should be very different than for a human. Exam questions that have you basically recall and repeat back what standard course material said is a clear case of this.
Read 9 tweets
Oct 10, 2022
If you teach students to work with data, you're doing them a great disservice if you just teach them how to run models/analyses and not how to clean and manipulate data. If you haven't tested them directly on this, you'll be surprised how unintuitive this is to new users!
In my data viz class, the week 3 assignment has them:

1. Read some data docs
2. Recreate some variables based on the docs ("count the number of peers of each gender in each class, not counting someone as their own peer")
3. Make some tables of the form "average X by group"
4. At a few different places clean the data up or check it to see if it makes sense

This is for many students an extremely difficult assignment, and the one for which I always get barraged with extension requests and told they spent hours on it.
Read 6 tweets
Oct 10, 2022
I have recently been following two sources of 90s music reevaluation: (1) The Number Ones and (2) the Woodstock 99 documentary and the things these, respectively, have most noticeably revised upwards my opinions of:

1. Mariah Carey
2. The Limp Bizkit song "Break Stuff"
i think i'm previously on record on twitter as rejecting any limp bizkit reevaluation, and i largely stand by that, but break stuff is an exception in the catalogue and dang did you see that crowd
the song is the stupidest and most direct thing in the world but that's absolutely to its advantage as the hallmark greeting card of angry pop music, which is not a sleight
Read 5 tweets
Oct 10, 2022
The steel nerve of teaching behavioral economics and saying mid-lecture "huh I don't remember the sample size on this study let me check real quick"
It was in the 40s
Steel nerve, of course, being inferior to have selected a better study in the first place
Read 4 tweets
Aug 30, 2022
Announcement and invitation! A new project that aims to improve the quality of research in applied microeconomics by examining researcher choices. I am hoping to recruit up to *200 researchers* of all kinds (with pay) and hope you will join me! (Thread) nickch-k.github.io/ManyEconomists/
This project, with Claus Portner, is a follow-up to this paper onlinelibrary.wiley.com/doi/full/10.11…, where multiple researchers each replicated the same studies (a “many-analyst study”). Analytic and data-cleaning choices were different, and this really impacted results.
In this new project, a larger number of researchers will independently complete the same research task. Then, there will be several rounds of revision following peer review, or a change in the research task that standardizes some of the choices made.
Read 12 tweets

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