October 2019
Beginner to intermediate
674 pages
16h 43m
English
Content preview from Mastering pandas - Second Edition
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Aggregation and GroupBy
Sometimes, we wish to split data into subsets and apply a function such as the mean, max, or min to each subset. In R, we can do this through the aggregate or tapply functions.
Here, we have a dataset of statistics on the top five strikers of the four clubs that made it to the semi-final of the European Champions League Football tournament in 2014. We will use it to illustrate aggregation in R and its equivalent GroupBy functionality in pandas.
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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.