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K-Nearest Neighbors (K-NN)

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How did KNN categorize a data point for two groupings?

Step 1: Choose the number K of neighbors

Step 2: Take the K nearest neighbors of the new data point, according to the Euclidean distance

Euclidean Distance = √(x2 - x1)2 + (y2 - y1)2

Step 3: Among these K neighbors, count the number of data points in each category

Step 4: Assign the new data point to the category where you counted the most neighbors

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