Number of possible baskets
In market basket analysis it is important to have a good understanding of concepts related to sets, subsets and supersets. The purpose of this exercise is to get a sense of how fast the number of possible baskets, i.e. subsets, grows as a function of the itemset size, i.e. the size of the original set. Suppose you are going to a slightly larger grocery store which instead of having only 4 distinct products offers 10 different products.
This exercise is part of the course
Market Basket Analysis in R
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# Number of items
n_items = ___
# Subset size
k = ___
# Number of possible subsets of size k
___(____,____)