September 2017
Beginner to intermediate
560 pages
25h 18m
English
book
R Data Analysis Cookbook, Second Edition - Second Edition
by Kuntal Ganguly, Davor Lozić, Mzabalazo Z. Ngwenya, Andrew Bauman, Shanthi Viswanathan, Viswa Viswanathan
Content preview from R Data Analysis Cookbook, Second Edition - Second Edition
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How to do it...
To create adjacency matrices and edge lists, follow these steps:
- Load Meetup.com user information from the meetup_users.Rdata file. This creates a data frame called users which has the variables, (user_id and group_id):
> load("meetup_users.Rdata")
- Create a sparse matrix with groups on the rows and users on the columns with TRUE on each (group_id,user_id) position, where the group has the user as a member. If you have a large number of users, this step will take a long time. It also needs a lot of memory to create a sparse matrix. If your R session freezes, you will have to either find a computer with more RAM or reduce the number of users and try again:
> library(Matrix) > grp.membership = sparseMatrix(users$group_id, ...
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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.
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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.