May 2024
Intermediate to advanced
486 pages
11h 33m
English
Content preview from Python Data Cleaning Cookbook - Second Edition
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Tidying and Reshaping Data
Echoing Leo Tolstoy’s wisdom (“Happy families are all alike; every unhappy family is unhappy in its own way.”), Hadley Wickham tells us, all tidy data is fundamentally alike, but all untidy data is messy in its own special way. How many times have we all stared at some rows of data and thought, “What… how... why did they do that?” This overstates the case somewhat. Although there are many ways that data can be poorly structured, there are limits to human creativity in this regard. It is possible to categorize the most frequent ways in which datasets deviate from normalized or tidy forms.
This was Hadley Wickham’s observation in his seminal work on tidy data. We can lean on that work, and our own experiences with ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.