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- Indexed issues, last 90 days
- 5
- Latest publication
- Sep 24, 2026
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- Earliest in this view
- Jul 14, 2026
Latest issues
The Biggest Mistake Data Professionals Are Making With AI in 2026 (opens the original)
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<img alt="" class="sizing-normal" height="819" src="https://substackcdn.com/image/fetch/$s_!xFMK!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F6c892ba2-a2f6-443e-bc7c-7e2e3ffcac20_1672x941.png"
20 Data Science Concepts You Need to Know (opens the original)
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<img alt="" class="sizing-normal" height="485" src="https://substackcdn.com/image/fetch/$s_!mwtd!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F5947a85d-c47e-4e88-9507-43c3d7c10df9_2400x800.jpe
How to Build an End-to-End Time Series Forecasting Model using LightGBM (opens the original)
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This week’s issue is a guest article by Gowthami Peri, a Lead Data Analyst at Target and the author of The Practical Data Scientist, a weekly newsletter on what data science actually looks like in the real world.Forecasting sounds simple until you try it on messy retail data with holidays, markdowns, and hundreds of stores. Gowthami works on exactly this kind of problem, and here she builds an end to end LightGBM forecasting model on the Walmart Recruiting dataset, from feature engineering throu
Build Your First RAG Chatbot (opens the original)
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RAG is the most common line on data resumes right now, and the least understood. I have watched people who list it go quiet when asked what actually happens between the question and the answer.I build these systems for a living, and the version that survives contact with real questions is not the one in most tutorials. Those are framework quickstarts that work in the demo and fall apart the moment someone asks something slightly off. So today we build a document chatbot from scratch. Small enoug
How to build a churn prediction model (opens the original)
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<img alt="" class="sizing-normal" height="764" src="https://substackcdn.com/image/fetch/$s_!mm4r!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F393a9ead-a5d5-424f-87b8-3c612f7685b7_2400x
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