Find the indices of the three nearest observations in X to each observation in Y with respect to the chi-square distance. This distance metric is used in correspondence analysis,
Gaussian mixture models (GMM) are often used for data clustering. Usually, fitted GMMs cluster by assigning query data points to the multivariate normal components that maximize the
Predict classification for a k-nearest neighbor classifier.
Examine the quality of a k-nearest neighbor classifier using resubstitution and cross validation.