While Model Trains

Read data blog posts.
Carefully handpicked.
Presented 3 at a time.

Unit Testing in Data Science

Jason Ash

A practical example of unit testing a function used to clean data before analysis.

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Bar charts: so popular, so abused

Martina Pugliese

Useful tips for creating better bar charts.

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Optimizing Slow SQL Queries

Miguel Grinberg

How to fix the most common database performance problems, which are caused by improper indexing, along with examples for Postgres, MySQL, and SQLite.

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