KwickClips Artificial Intelligence · 41 sec · free
Is k = 1 risky?
Short answer. Yes. One odd neighbour can fool it.
How do you pick k?
Test several values and keep the most accurate.
Choosing k
| Too small: fooled by one point |
| Too large: far points vote |
| Odd k avoids ties |
Remember
| Test several k values |
| Keep the most accurate |
One odd neighbour can fool your model. So which k is best? Choose k with care. Too small, and one odd point fools it. Too large, and far points vote. An odd k avoids ties. Test several k values. Keep the most accurate.
This clip is from the full lesson: Classification and the k-Nearest Neighbours Algorithm — 7 minutes, with the tables, the quick answers and the whole lesson in text.
Useful for: CBSE Class 10 Artificial Intelligence (417), CBSE Class 10 Artificial Intelligence (417), CBSE Class 11 Artificial Intelligence (843), CBSE Class 11 Artificial Intelligence (843)
More KwickClips from this lesson
What is the output of classification?39 sec
What does k mean in k-NN?39 sec
Which fruit wins with k = 3?40 secVoice-over is AI-generated; the script is written and checked by Kajal Ma'am. Confirm anything you plan around against your official board document. We never ask for a password or an OTP.