Christopher Maronga
  • About
  • Talks
  • Publications
  • CV
Categories
All (7)
API (3)
Data management (1)
Data mining (1)
Data wrangling (5)
Health data (1)
ICD-10 (1)
REDCap (1)
SQL (1)
code (1)
social (1)
tidyverse (7)

Creating a Data Dictionary for Deployed KoboToolbox Forms

KoboToolbox has no data dictionary export like most EDCs. Here is how to build one in R from your deployed forms with the {robotoolbox} package, so the codebook always matches the data.

2026-10-31
24 min

Extracting ICD-10 Code list using R and the WHO ICD API

How to pull over 12,000 WHO ICD-10 (2019) codes, with their blocks and chapters, into a tidy dataset in under a minute using R, httr2 and the free WHO ICD API.

2026-10-23
19 min

Web scraping using R

Harvesting dollar exchange rates and CRAN package data from the web with {rvest}, and what to do when a page isn’t a simple HTML table.

2023-10-31
16 min

dplyr::coalesce() in action

Using dplyr::coalesce() to merge values scattered across several columns into one missing-value-free variable, with worked examples.

2023-10-27
4 min

Celebrating 100 days of Gym dedication

Tracking a year of gym visits and weekend runs with the tidyverse, and celebrating 100 days of showing up.

2023-10-24
11 min

Working with Databases in R

Connecting R to MySQL, SQLite and REDCap and querying data directly from RStudio, a follow-up to the NairobiR and RLadies training session.

2021-06-12
2 min

Automating Clinical Data Management

How the CHAIN cohort combined REDCap, RStudio Server and Shiny Server to automate data cleaning, query tracking and progress reporting across nine hospitals in Africa and Asia.

2018-12-16
6 min
No matching items