Recommender System

$5$ points

Consider a table with $4$ user ratings on $8$ items as shown below

$\backslash$table$[[$userID$/$game$,$WatchDog,GTAV,PUBG,StarCraft,CallOfDuty,FIFA,wow,MineCraft$],[$firechicken$,3,3,4,,4,2,3,],[$mike$0702,3,5,4,3,3,,,4],[$zephyros$,,4,,5,,,2,1],[$dadvador$,2,,,4,,4,4,5]]$

Treating the utility matrix as boolean $($buy or not buy$),$ compute the Jaccard distance between firechicken and dadvador. Please answer to three decimal places.

Note: It is possible to solve this question mathematically, but it may be easier to solve this question programmatically.

$4.$ Recommender System

$5$ points

Consider a table with $4$ user ratings on $8$ items as shown below.

$\backslash$table$[[$userID$/$game$,$WatchDog,GTAV,PUBG,StarCraft,CallOfDuty,FIFA,wow,MineCraft$],[$firechicken$,3,3,4,,4,2,3,],[$mike$0702,3,5,4,3,3,,,4],[$zephyros$,,4,,5,,,2,1],[$dadvador$,2,,,4,,4,4,5]]$

Treating the utility matrix as boolean $($buy or not buy$),$ compute the Cosine distance between zephyros and dadvador. Please answer to three decimal places.

Note: It is possible to solve this question mathematically, but it may be easier to solve this question programmatically.