Data Viz · 13 min
Adding interactive tooltips to SVG files
Joining R, Python, and JavaScript together into a single visualization.
A Gallo Pinto Blog
21 postsRice and beans — a mix of different and sometimes opposite things. Random walk in action.
Series2 parts · 2025 · ongoing
Clustering public opinion
Finding groups of like-minded regions in the EUROVOICES survey data — from framing the problem to imputing missing answers with MICE.
Series6 parts · 2023—2024
Building a classification system
From gathering and labelling data to using LLMs as classifiers, ending with the EU Rule of Law Tracker.
Series2 parts · 2023—2024
Apps with Streamlit
Building small data apps in pure Python — from first widgets to wiring up Dropbox as remote storage.
Data Science · 10 min
Ok, but what do you mean by workflow?
I use the word workflow a lot when talking to people from other teams. And they are used to it by now, but they always aks me... what is the workflow?
GIS · 10 min
Simplification Algorithms in R
Geometry Simplification is a very helpful way to optimize the storage, processing, and visualization of your geographic data.
Data Science · 11 min
Character encodings and why you need to know about them
Working with text data can be fun, but also tricky. Always be careful of which encoding system you are using, specially if you are dealing with characters or graphemes unknown to the English alphabet.
GIS · 7 min
Exploding geometries with GeoPandas
Some geographical data sources include Taiwan as part of China. In this post, I show you how to split these territories without having to use other data source.
Series1 part · 2023 · ongoing
Data viz tutorials
Step-by-step builds of individual charts, one visualization at a time.
GIS · 9 min
Geocoding and visualizing address information with R
When dealing with online data, we frequently encounter information about locations. In this post, I will be showing you how to transform this information into geographical coordinates using R programming language.
Series3 parts · 2022
Webscrapping 101
Collecting data from the web with Python: how websites are structured, harvesting with requests, and automating browsers with Selenium.
Data Viz · 7 min
The Data Viz process
Coming up with the almost perfect visualization for your data is not easy task. In this post, I go through my Data Visualization process as part of my daily routine.