Mark van Venrooij's blog

Categorizing Transactions with Machine Learning and rules

In this post, I’ll demonstrate how combining rules-based systems with machine learning — specifically Random Forest — can significantly improve transaction categorization, particularly for incidental and non-recurring cases. This hybrid approach not only reduces manual efforts but also improves accuracy, helping me make better financial decisions with minimal intervention.

December 14, 2024

Making the rules part of the domain

In this blogpost I find a way to make the rules part of the domain. Next to that I develop some code so I can store them on disk. Find the resulting code at GitHub.

January 28, 2023

Not getting financial insight

TL;DR In this post I describe how I discover some imperfections in the current domain. This hampers me in getting financial insight. I fix these imperfections by creating new Category rules. After creating new rules I refactor the rules in to a simpler form. Furthermore I fix Transaction in the domain. As the found issues…

December 10, 2022

Putting the domain to work

In this post I create a way to import transactions and categorize them. Basically putting the earlier created domain to work. In the end I get some insight into my spendings, however not completely done yet. The resulting code can be found at GitHub.

December 3, 2022

Continuing Domain Driven Design

tl;dr In this post I continue my progress towards an DDD version of my favorite pet project. In this iteration I add a way to check the budget against the real expenses. The code is on GitHub and the picture contains the new model. Continuing Domain-Driven Design In my previous blog post I started to…

July 25, 2018