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About: This applet shows the decision surfaces created by various configurations of the kNN classifier. kNN-1: Considers one nearest neighbor. kNN-ALL: Considers all data points, weighted inversely by their distance. Usage: Use the 'Shuffle' button to generate a new set of instances. You can also use the left or right mouse button to add instances of red or green class, respectively. Try putting a lot of red dots at the same place, and see the decision boundaries change in kNN-ALL mode. |