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Exercise

Refining support with confidence

After reporting your findings from the previous exercise, the library asks you about the direction of the relationship. Should they use Harry Potter to promote Twilight or Twilight to promote Harry Potter?

After thinking about this, you decide to compute the confidence metric, which has a direction, unlike support. You'll compute it for both {Potter} \(\rightarrow\) {Twilight} and {Twilight} \(\rightarrow\) {Potter}. The DataFrame books has been imported for you, which has one column for each book: Potter and Twilight.

Instructions

100 XP
  • Compute the support of {Potter, Twilight}.
  • Compute the support of {Potter}.
  • Compute the support of {Twilight}.
  • Compute the confidence of {Potter} \(\rightarrow\) {Twilight} and {Twilight} \(\rightarrow\) {Potter}.