Suppose I have a data set of movie ratings:
Movie My Rating Critic1 rating Critic2 rating
a 2 2 4
b 4 3 1
c 3 4 5
d 2 3 4
e 3 3 5
(assume each movie is rated 1-5)
How would I calculate which critic has the most similar taste to my own movie ratings? Preferably, I would like to calculate a percentage of similarity.