What should be the ideal value for k?

#1

In MNIST challenge, what should be the optimal value of k ?

#2

Hey @ishabehera, the ideal way around to judge optimal value of k is first split the data into 80:20, Now in Knn use first 80% of data, as training data and check accuracy on remaining 20% of data.

K value should be ideally odd (to avoid equal vote contradiction) and K< sqrt(number of training examples).

Now, for different problems you need to run for various values of k and check the score/accuracy on validation data, and than report the best value.

Hope this resolved your doubt.
Plz mark the doubt as resolved in my doubts section. :blush: