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Showing posts with the label data visualization

What New York Times Data Reveals. 2.2 Million Headlines over 25 Years.

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I fed a quarter century of New York Times headlines into Python. What came back was a portrait of a nation's mood, one year at a time.  Using Python, TF-IDF, sentiment analysis, and named-entity recognition to examine how headline language changed from 2000 to 2025. There's a moment in every data project when a spreadsheet stops being a spreadsheet and starts being a story. Mine came about an hour into cleaning a dataset, when I noticed that a single row of "short description" text was 504,071 characters long. Somewhere in there, buried in a single cell meant to hold a sentence, was what looked like an entire article. Maybe a whole day's worth of them. That's the thing about big datasets: they don't just contain information, they contain accidents, artifacts, and fingerprints left by the humans and systems that built them. Before I could ask any interesting questions, I had to become something between a detective and a janitor. The dataset itself was simp...

Demystifying Linear Regression: A Simple Guide to Predicting Real-World Outcomes

  Demystifying Linear Regression: A Simple Guide to Predicting Real-World Outcomes By Emmanuel Olimi Kasigazi Have you ever wondered how weather forecasters predict temperatures or how businesses forecast sales? At the heart of these predictions lies a simple yet powerful statistical tool known as linear regression. Linear regression might sound intimidating at first, but it's actually a straightforward method that helps us predict one variable based on another. Think of it as a tool that draws the "best-fit line" through data points, helping us understand trends and predict future values. What Exactly is Linear Regression? In simple terms, linear regression explores the relationship between two variables by fitting a straight line through data points. One variable is considered independent (predictor), and the other is dependent (response). For instance, predicting ice cream sales based on temperature: temperature is your predictor, and ice cream sales are the respo...