iiinova — where your digital self keeps evolving

Frank Harrell @f2harrell.bsky.social · 20/08/2026

The more I use @typst.app for producing pdf files (haven't gotten much into html production yet) the more I love it. I'm finishing, with Claude's help, major updates to the #RStats Hmisc and rms packages that add full Typst support.

Typst output of R rms package lrm model fit

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Frank Harrell @f2harrell.bsky.social · 07/08/2026

Believe it or not these are all special cases of cumulative probability ordinal regression as discussed at fharrell.com/post/cpm: #Statistics #StatsSky

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Frank Harrell @f2harrell.bsky.social · 30/07/2026

Here are some new timings for Bayesian proportional odds models, using 4 cores (4 chains) with cmdstan and my R rmsb package blrm function. Non-Dirichlet priors result in divergences after 300 intercepts, and slowness, so timings for them are not shown for > 300 distinct Y-values. #Statistics

Timings of Bayesian proportional odds models using cmdstan

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Frank Harrell @f2harrell.bsky.social · 17/06/2026

P-value = P(data MORE extreme than mine | H0). Justification for this is largely missing. See fharrell.com/post/journey

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Frank Harrell @f2harrell.bsky.social · 16/05/2026

Computing tool of the day: I've needed to have an elegant way to stitch together pieces of Quarto books to make a unified html file for teaching. In collaboration with Claude I now have a great yaml-driven tool for this. #RStats

Yaml markup for specifying which sections of which books to extract or exclude, for building a course html presentation file.

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Frank Harrell @f2harrell.bsky.social · 18/04/2026

There is also an "st" command line option to get a symbol table at the end of the R code listing. #RStats

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Frank Harrell @f2harrell.bsky.social · 18/04/2026

Python script for pretty-printing of R code files: github.com/harrelfe/rsc...

Color-highlighted pretty-printing of R code

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Frank Harrell @f2harrell.bsky.social · 02/04/2026

Got a personal email out of the blue for a ghost worker. Shameless.

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Frank Harrell @f2harrell.bsky.social · 23/02/2026

Goal-Driven Flexible Bayesian Design presentation updated w/comparison of performance of frequentist group sequential designs: hbiostat.org/bayes/design . Frequentist approach takes far too long to make a decision by controlling something that is NOT an error prob. #Statistics #StatsSky

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Frank Harrell @f2harrell.bsky.social · 15/12/2025

Nice work, and these linear models are special cases of semi parametric ordinal regression with no normality assumption - hbiostat.org/rmsc/ordsurv

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Frank Harrell @f2harrell.bsky.social · 09/11/2025

I just posted a critique of this paper at discourse.datamethods.org/t/critique-o... where I hope others will add their thoughts #StatsSky #EpiSky #Statistics #rct

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Frank Harrell @f2harrell.bsky.social · 06/11/2025

Here’s the example: hbiostat.org/bbr/images/a...

Horizontal dot chart with side effects (adverse events) from a drug and confidence intervals for risk differences.

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Frank Harrell @f2harrell.bsky.social · 20/10/2025

Ordinal semiparametric cumulative probability models have an amazing variety of statistical methods as special cases, including proportional odds and proportional hazards models - hbiostat.org/rmsc/ordsurv... #Statistics #StatsSky

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Frank Harrell @f2harrell.bsky.social · 15/07/2025

#Statistics thought of the day: The Central LIMIT Theorem hbiostat.org/bbr/htest.ht... #StatsSky

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Frank Harrell @f2harrell.bsky.social · 13/06/2025

I lost Galben in 2019 and still think about him a lot. We had a deep connection.

Frank Harrell with dog Galben at the beach

Frank Harrell and dog Galben looking at distant waters

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Frank Harrell @f2harrell.bsky.social · 14/04/2025

The #rstats qreport package for assisting with report writing using Quarto has a new function makegvflow that allows users to easily make graphviz flow diagrams by specifying plain text with indenting to define the hierarchy. An example is at hbiostat.org/rflow/rforma...

Text markup for constructing simple flow diagrams with quarto

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Frank Harrell @f2harrell.bsky.social · 10/01/2025

Nashville is a winter wonderland today

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Frank Harrell @f2harrell.bsky.social · 14/11/2024

3/3 The third way to make code more readable is to use Quarto's wonderful code annotation syntax. When you hover over one of the circles, the annotation pops up. #rstats