Tracing a chart screenshot back to the run that made it
gglineage writes an ID into a ggplot2 chart as a faint row of dots, so a screenshot that has lost its file name and metadata can still be traced to the script and data behind it.
Writing
Selected recent work
Building an Aliens motion tracker with a 24 GHz radar
A radar module, an I2C-to-UART bridge, and a 4.3-inch ESP32 screen. The signal chain works and the scope runs at 30 FPS. It hasn't looked through a wall yet.
Skim: reading one word at a time, and what it costs
Notes on an iPhone app that shows text one word at a time, what the research says that kind of reading costs, and the design choices I made to pay it back.
An RStudio addin that makes GitHub permalinks in one keystroke
perma is an RStudio addin that builds a GitHub permalink, pinned to the current commit, for the lines under the cursor, and follows a pasted permalink back to the file and line.
Linear algebra from scratch in Rust
Four months, 58 commits, and a matrix inverse built from cofactors. The type system flagged the float sorting problem. It didn't catch a single shape error.
Archive
Earlier projects, from 2019 to 2022, while I was a student.
- Generating tabular data with a GAN, one tiny network per row
- Predicting wine scores from chemistry, and from price and region
- Pricing a butterfly spread with Black–Scholes
- What a small online shop's orders said about its customers
- Forecasting 500 store-item sales series with six models
- How many rooms should a hotel overbook?
- Measuring Brussels sprout tenderness with a fork and a kitchen scale
- Picking the 2021 NCAA tournament with three GLMs
- Scoring simple forecasts across S&P 500 stocks
- Scoring a Secret Santa guessing game with R and Google Forms
- Rebuilding summary(lm()) with matrix algebra
- Testing 20,000 SNPs at once
- Simulating power for a BMI and blood pressure regression
- A bootstrap band for gout risk, and an exponential MLE three ways
- Meeting lengths in three years of Michigan small business counseling records
- Forecasting frozen veggie burgers, and losing to the naive method
- Thirty charts for a mock FOMC meeting
- Will younger workers benefit from population aging?
- Does a graduate degree close the wage gap between college majors?