It appears in a lot of Machine Learning interviews that, What is the KNN algorithm in Machine Learning? Today we are going to discuss it in depth. Read the full post to get a basic understanding of the KNN algorithm.
Suppose we have a test Input X and we have to classify this X into a label based on our training dataset. How can we do this? Through the KNN algorithm we have to classify X based on its K neighbours. Let’s say we are classifying X based on K=3, so in order to label the X, we will look into the 3 nearest neighbours of X, so if among the 3 neighbours if 2 labels are Yes then, we will classify X as Yes.
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