Description: Develop a k-NN classifier with Euclidean distance and simple voting.Perform 5-fold cross validation, find out which k performs the best (in terms of accuracy)。Use PCA to reduce the dimensionality to 6, then perform 2) again.
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code_1\cross_accuracy.m
......\cross_validation.m
......\KNN.m
......\knntest.m
......\PCA.m
......\wine data.txt
code_1
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