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recent posts

Author

Josiah Parry

Create and edit TOML in R with {tomledit}

r

toml

rust

extendr

{tomledit} v0.1.1 has found its way onto CRAN.

🎄dvent Day 1: Rust and R solutions

r

rust

aoc

I give you the solutions to Day 1 of Advent of Code in R, Rust, and Rust in R for part 2 using {extendr}.

Implementing OpenID Connect (OIDC) in R

r

httr2

auth

oidc

I am working on a rust project that I want to use OpenID Connect for. I’m struggling to wrap my head around it, so naturally, I implemented it in R to understand it better.

S7 & Options objects

reimagining readr::read_csv()

pkg-dev

r

s7

One scenario I have encountered is the case case of readr::read_delim(). The argument col_names = TRUE by default, can be FALSE, or it can be a character vector of the names…

Add syntax highlighting to leptos

rust

leptos

I’ve been building a thing with Leptos and Tailwind CSS for a while.

Get notified of failing CRAN checks

A GitHub Action for package developers

cran

r

pkg-dev

There is a new GitHub Action that you can use with your CRAN package. It will run once a day. If there are any WARN or ERROR statuses in any of the check flavors, then the…

Type safe(r) R code

Robust type checking with r-lib

r

Type safety is all the rage these days. It’s the (one of the many) reason why people love Rust , TypeScript, and Pydantic.

Read a CSV in a production API

{plumber} and multipart request #RinProd

plumber

r

prod

Deploying RESTful APIs is the way to put any language into production. R is not any different.

Static file server in R

{plumber} is (always) the answer

r

plumber

api

Plumber, ambiorix, and opencpu are the keys to putting R into production.

Caching WebR from CDN

Notes from developing webr-js-rs

webr

rust

r

I am developing Rust bindings to WebR. Because WebR is not compiled for WASI and only WebAssembly, native Rust bindings are not possible. Instead, bindings are done through w…

Evaluate strings as code

r

Prompted by a post on Mastodon, I wanted to explore how to evaluate an R string as code.

Docker: keep your secrets secret

production

docker

You’ve written a shiny app, plumber API, or an ETL process. Your orchestrating that work with Docker. In order for the application to work, you need to be able to use secret…

Making a Ridiculously Fast™ API Client

Design choices for a highly performant R package

I recently had the pleasure of publishing the R package {arcgisgeocode}. It is an R interface to the ArcGIS World Geocoder. You could say it is the “official” Esri geocoding…

IndexMap instead of BTreeMap

rust

When I am programming in Rust, I often need to use either a HashMap<K, V> or a BTreeMap<K, V>. In the case of a BTreeMap, the order is based on the key values. For example…

{duckdb} or {duckplyr}?

DuckDB and the R ecosystem

r

prod

duckdb

I’ve been diving pretty deep into DuckDB. It has shown that it has great utility for the vast majority of mid to large scale data analysis tasks—I’m talking Gigabytes not…

Spatial ML: Predicting on out-of-sample data

3 approaches to using spatially derived features

spatial

ml

The incorporation of spatially dependent variables in a machine learning model can greatly improve the model’s performance. These features can include, but not limited to:

Univariate Spatial Dimensionality Reduction

Extening PCoA and Moran Eigenvector Maps to include attributes

spatial

r

In discussing principal coordinate analysis (PCoA), the question naturally arose of “how could we incorporate non-spatial data into this method?” Well, that is what I wanted…

Encoding spatial patterns as variables

Principal Coordinate Analysis & Moran Eigenvectors

spatial

r

I’ve begun reading “Spatial modelling: a comprehensive framework for principal coordinate analysis of neighbour matrices (PCNM)” which describes the process of making “Moran…

Databases for Data Scientist

And why you probably dont need one

production

arrow

duckdb

It’s been coming up a lot recently, or, maybe, I’ve just been focused on this a lot more. Data scientists are coming to terms with the fact that they have to work with…

Why do we sleep on factors?

And how I wish things may behave?

r

Factors are R’s version of an enum(eration) (related post). They’re quite handy and I think we can probably rely on them a bit more for enumations like c("a", "b", "c").…

Shared segment of parallel lines

r-spatial

spatial

I am working on a problem where I identify approximately parallel lines. From the two lines that I have deemed parallel, I want to calculate the length of the segment that…

Leptos & wasm-bindgen

note to self: its tricksy

rust

As a side project, I’m trying to build a full stack web app with auth, session management etc. I do data science and no web-dev. I am very out of my element. But no better…

Writing S3 `head()` methods

a note to self for later

pkg-dev

I’ve been struggling for the past 15-20 minutes trying to fix the following R CMD check greivances.

Building a DataFusion CSV reader with arrow-extendr

extending R with Arrow and Rust

rust

pkg-dev

extendr

arrow

Want to skip to the end with the source code? Click here.

Enums in R: towards type safe R

r

package-dev

rust

Hadley Wickham has recently dropped a new draft section of his book Tidy Design Principles on enumerations and their use in R.