View built-in dataset from a package
I have installed the packages arules. How can I view the built-in dataset as usual?
library(arules) data(Groceries) Groceries
While it only offer me:
transactions in sparse format with 9835 transactions (rows) and 169 items (columns)
What is sparse format?
inspect(Adult) inspect(Adult[1:10,1:10]) inspect(Groceries)