Most of the articles on the internet shows the Market Basket Analysis using data from supermarket (i.e. clients uses to buy a lot of items in one day in a supermarket), so I think makes sense to group the transactions by day.
In my work I'm doing a Market Basket Analysis, but as the majority of the clients just buy 2 or 3 items by day, I grouped the data by month (also tried to group by week). In total, I have 18k items bought.
That makes sense?
I did this to have more bigger rules, like $\{A\} \rightarrow \{B\}$, or $\{A, B\} \rightarrow \{C\}$.
Obs.: I'm using R (library arules
).