Groceries dataset: List transaction with only n items

Question

this is a special question and since I have been for lot of weeks of research I didn't found any answer.

The dataset is Groceries I get with this commands:

install.packages("arules")
library(arules)
data(Groceries)

I try to show the number of transactions that have n items them (in R with R Studio). I am completely stuck. I though at first creating a rule.... but I'm still stuck at this step.

Can someone help me?

Thank you in advance!

I have no clue on how the class `transactions` with attribute `arules` works. I think a more careful reading of the documentation would help. Look [here](https://rpubs.com/Mentors_Ubiqum/Filter_Transactions). — Francesco Grossetti, Apr 01 '20 at 14:24
It didn't help for this case, but it helped me for another one. I'm still stuck.. — Noemie, Apr 01 '20 at 14:46

score 2 · Accepted Answer · answered Apr 01 '20 at 14:47

2

This should do it! Let me know if this is what you meant!

n_items <- 4
large_transactions <- Groceries[size(Groceries) > n_items]

answered Apr 01 '20 at 14:47

Noah Olsen

271
1
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Thank you a lot! It is the answer I was looking for! – Noemie Apr 01 '20 at 15:17

Groceries dataset: List transaction with only n items

1 Answers1