Resolution: Won't Fix
Affects Version/s: None
Fix Version/s: None
Support is an indication of how frequently the item-set appears in the database. Besides confidence, "Support" is another critical property for Association rule.
Support can be either the count of appearances or the fraction within the dataset. I choose to use the count as:
1. API compatibility: Currently both FPGrowthModel and Association Rule does not have the information about size of the dataset. I'd try to avoid breaking a list of public APIs.
2. This also refers to the API of SPMF. http://www.philippe-fournier-viger.com/spmf/index.php?link=documentation.php#allassociationrules.
In the next steps, we could add constraint like minSupport as in other libraries. FPGrowthModel should also contains the size of the dataset.