Replace all NaN values with 3 for reasons I don't really understand
Replace all NaN values with 3 for reasons I don't really understand

s-ramaswamy/CS-229-project,s-ramaswamy/CS-229-project,s-ramaswamy/CS-229-project,s-ramaswamy/CS-229-project,s-ramaswamy/CS-229-project,s-ramaswamy/CS-229-project