Supervised Learning -- K Nearest Neighbors Algorithm (KNN)

This article explains one of the simplest machine learning algorithm K Nearest Neighbors(KNN). KNN classifier and KNN regression are explained with examples in this article. K nearest neighbors algorithm basically predicts on the principle that the data is in the same class as the nearest data. According to name of the algorithm, "nearest neighbors" represents the closest data and "k" represents how many closest data is chosen. K value is a hyper parameter so it is tuned by the user and each trial usually gives different results.