Plot number of possible baskets
In this exercise, you will visually see how quickly the number of possible baskets grows as a function of the itemset size. This will illustrate one of the main challenges in Market Basket Analysis which is the large number of possible ways of creating a basket. You will be using here the stat_function(); this function allows you to specify within your ggplot() call which function you would like to plot by specifying the argument fun.
Den här övningen är en del av kursen
Market Basket Analysis in R
Interaktiv övning med praktiskt arbete
Testa den här övningen genom att slutföra den här exempelkoden.
# Define number of items in the set
n_items = ___
# Specify the function to be plotted
fun_combi = function(x) choose(___, ___)
# Plot the number of combinations
ggplot(data = data.frame(x = 0), mapping = aes(x = ___)) +
stat_function(fun = ___) + xlim(0,n_items)