R Basket Analysis using arules package with unique order number but duplicate order combinations

Question

R Basket analysis using arules package with unique order number but duplicate order combinations

Just learning R. I\'m trying to do a basket analysis using the arules pa

Answer 1

Ok, after hours of searching and reading all the pdfs I could find, I finally found the answer (and most helpful walkthrough of apriori/basket analysis ever!) in the DATA MINING Desktop Survival Guide by Graham Williams:

The read.transactions function can also read data from a file with transaction ID and a single item per line (using the format="single" option).

So there was no need to do all those transformations after import. I should have just been importing straight from the original csv file specifying the "single" format option instead of "basket." I also had to make sure the file contained no column names and that there was a unique representation of item type paired with order number (for instance, if a person ordered two items from the "Grocery" category, this needs to be represented on one row). And the cols=c(2,1) option indicates that column 1 contains the order number and column 2 is the rest of the data (ItemType).

tr <- read.transactions(file='dataset.csv', format='single', sep=',', cols=c(2,1))