Just found 'ngCMatrix' class, it must be the way to go?
---------------------------------------------
Message: 47Date: Mon, 20 Dec 2010 17:41:20 +1100
From: Kohleth Chia <kohl...@gmail.com>
To: r-help@r-project.org
Subject: [R] package "arules" - 'transpose' of the transactions
Message-ID:
<aanlktimmhuj+gnthvjvt8yomf3c5sqorkxcvgb3ut...@mail.gmail.com<aanlktimmhuj%2bgnthvjvt8yomf3c5sqorkxcvgb3ut...@mail.gmail.com>
>
Content-Type: text/plain
Suppose this is my list of transactions:
set.seed(200)
3)
tran=random.transactions(100,
inspect(tran)
items transactionID
1 {item80} trans1
2 {item8,
item20} trans2
3 {item28} trans3
I want to get the 'transpose' of the data, i.e.
transactionID items
1 {trans2} item8
2 {trans2} item20
3 {trans3} item28
4 {trans1} item80
I tried converting tran into a matrix, then transpose it, then convert it
back to transactions. But my dataset is actually very very large, so I
wonder if there is any faster method?
Thanks
--
KC
[[alternative HTML version deleted]]
[[alternative HTML version deleted]]
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
