• KNN classifier: the 1st choice of classifier.

• X_test in KNN is a single test case

KNN classifier example

• If K is small, the k might be example of overfitting, K is large might be the ex of underfitting

  

  • in this class may only using the histgram, others will put in ML next semester

Example of Classification

Today(Y) ~ lagX (Time Series)

For the procedure, we need to write a function by our own:

• Euclidean distance b/t new point(L1.new, l2.new) and all data points