Discover @jhelvy Open Source projects

John Helveston (@jhelvy)

jhelvy

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Registered about 10 years ago
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Location 🇺🇸 United States
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splitKbCompare

An interactive tool for comparing layouts of different split mechanical keyboards

renderthis

An R package for building xaringan slides into multiple outputs, including html, pdf, png, gif, pptx, and mp4.

wireless-corne

Build log and photo gallery for my Wireless Corne keyboard

distillery

A distill blog and showcase about building distill websites and blogs!

logitr

Fast estimation of multinomial (MNL) and mixed logit (MXL) models in R with "Preference" space or "Willingness-to-pay" (WTP) space utility parameterizations in R

stanTuneR

This code uses the algebra solver in Stan (https://mc-stan.org/) to find the parameters of a distribution that produce a desired tail behavior.

kyria_3d_cases

qmkJsonConverter

R code to convert the .json file from the QMK configurator into a keymap.c file

surveydown

An attempt to build a markdown-based survey platform using Quarto & Shiny

jKeyboard

Files for creating my custom keyboard, including my Karabiner-Elements settings and WASD Keyboard layout files

formr4conjoint

A simple demo of using formr.org to create a choice-based conjoint survey

lexis

A theme for xaringan slides

jhelvy_distill

Source files for my personal website, built using the {distill} R package and deployed with netlify

mlogitCars

An example of estimating choice models in R using the mlogit package

jph

A bunch of useful functions for working in R

iris-rev2

Build log of my Iris keyboard (a.k.a. the "Altoids Can")

solar-learning-2021

This repository contains the data and code to reproduce results from our study titled "Quantifying the cost savings of global solar photovoltaic supply chains". The link below is to an app to assess the sensitivity of our study outcomes to different modeling assumptions.

jhelvy_quarto

Source files for my personal website, built using Quarto and deployed with Netlify

renderthistemp

Render slides and other media into different formats

cbcTools

An R package with tools for designing choice based conjoint (cbc) survey experiments and conducting power analyses

maddTools

An R package of functions for the GWU course EMSE 6035: Marketing Analytics for Design Decisions

charts

A repo of reproducible charts

coding-with-ai

conjointTools

An R package with tools for designing choice based conjoint (cbc) survey experiments and conduction power analyses

surveys-with-formr

Files for my rstudio::conf 2021 lightning talk: "Using formr to create R-powered surveys with individualized feedback"

tra2015

Raw data and replication of results from our 2015 publication in Transportation Research Part A

zmk-config-corne

slides

Slides for talks I've given

factorlock

Set factors levels based on row order

cv

My CV, generated using R, Quarto, and a Googlesheet

2023-qux-conf-conjoint

Content for my workshop at the 2023 Quant UX Conference on Open Source Conjoint in R

smartcharging

gglabelr

Interactive shiny app to create labels on ggplot

p4a

Source code for my book "Programming for Analytics in R"

scraperToolkit

Toolkit for webscraping in R and Python

jhelvy.github.io

stories-with-data

Workshop on telling stories with data

carsheet

Webscraping of the data at carsheet.io