Let's figure out what went wrong with our movie similarities there. We went through all this exciting work to compute correlation scores between movies based on their user ratings vectors, and the results we got kind of sucked. So, just to remind you, we looked for movies that are similar to Star Wars using that technique, and we ended up with a bunch of weird recommendations at the top that had a perfect correlation.
And, most of them were very obscure movies. So, what do you think might be going on there? Well, one thing that might make sense is, let's say we have a lot of people watch Star Wars and some other obscure film. We'd end up with a good correlation between these two movies because they're ...
