April 2015
Beginner to intermediate
504 pages
8h 36m
English
Content preview from Learning Pandas
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The split, apply, and combine (SAC) pattern
Many data analysis problems utilize a pattern of processing data, known as split-apply-combine. In this pattern, three steps are taken to analyze data:
- A data set is split into smaller pieces
- Each of these pieces are operated upon independently
- All of the results are combined back together and presented as a single unit
The following diagram demonstrates a simple split-apply-combine process to sum groups of numbers:
This process is actually very similar to the concepts in MapReduce. In MapReduce, massive sets of data, that are too big for a single computer, are divided into pieces and dispatched to many systems ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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.