machine learning

EDA in Public (Part 2): Product Deep Dive & Time-Series Evaluation in Pandas

! Welcome back to the “EDA in Public” series! That is Part 2 of the series; when you haven’t seen Part 1 yet, read it here. Here’s a recap of what we conquered. In Part...

Understanding the Generative AI User

in some interesting conversations recently about designing LLM-based tools for end users, and one in every of the vital product design questions that this brings up is “what do people find out about...

Lessons Learned from Upgrading to LangChain 1.0 in Production

first stable v1.0 release in late October 2025. After spending the past two months working with their latest APIs, I genuinely feel that is essentially the most coherent and thoughtfully designed version of...

Lessons Learned After 8 Years of Machine Learning

a decade old now. Back then, OpenAI felt like one (well-baked) startup amongst others. DeepMind was already around, but not yet fully integrated into Google. And, back then, the “triad of deep learning” —...

The Machine Learning “Advent Calendar” Day 19: Bagging in Excel

For 18 days, we've got explored many of the core machine learning models, organized into three major families: distance- and density-based models, tree- or rule-based models, and weight-based models. Up so far, each article focused...

The Machine Learning “Advent Calendar” Day 18: Neural Network Classifier in Excel

Neural Network Regressor, we now move to the classifier version. From a mathematical viewpoint, the 2 models are very similar. In truth, they differ mainly by the interpretation of the output and the selection...

A Practical Toolkit for Time Series Anomaly Detection, Using Python

fascinating points of time series is the intrinsic complexity of such an apparently easy kind of information. At the tip of the day, in time series, you've an x axis that typically represents time...

The Machine Learning “Advent Calendar” Day 14: Softmax Regression in Excel

With Logistic Regression, we learned classify into two classes. Now, what happens if there are greater than two classes. n is just the multiclass extension of this concept. And we are going to discuss this...

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