October 2017
Beginner to intermediate
572 pages
26h 1m
English
book
Machine Learning with R Cookbook - Second Edition
by AshishSingh Bhatia, Yu-Wei, Chiu (David Chiu)
Content preview from Machine Learning with R Cookbook - Second Edition
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How to do it...
Perform the following steps to transform different formats of data into transactions:
- First, you have to install and load the arule package:
> install.packages("arules")
> library(arules)
- You can then make a list with three vectors containing purchase records:
> tr_list = list(c("Apple", "Bread", "Cake"),
+ c("Apple", "Bread", "Milk"),
+ c("Bread", "Cake", "Milk"))
> names(tr_list) = paste("Tr",c(1:3), sep = "")
- Next, you can use the as function to transform the DataFrame into transactions:
> trans = as(tr_list, "transactions")
> trans
Output
transactions in sparse format with
3 transactions (rows) and
4 items (columns)
- You can also transform the matrix format data into transactions:
> tr_matrix = matrix( + c(1,1,1,0, ...
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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.
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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.