Writing rules generated by Apriori
I know I'm answering my own question, but I found out that the solution is to use as() to convert the rules into a data frame. [I'm new to R, so I missed this my first time searching for a solution.] From there, it can easily be manipulated in any way you'd like (sub setting, sorting, exporting, etc.).
> mba = read.transactions(file="Book2.csv",rm.duplicates=FALSE, format="single", sep=",",cols=c(1,2));
> rules_1 <- apriori(mba,parameter = list(sup = 0.001, conf = 0.01, target="rules"));
> as(rules_1, "data.frame");
Another way to achieve that would be:
write(rules_1,
file = "association_rules.csv",
sep = ",",
quote = TRUE,
row.names = FALSE)