the cluster centers found by -means are very smooth versions of faces this is not very surprisinggiven that each center is an average of to face images working with reduced pca representation adds to the smoothness of the images (compared to the faces reconstructed using pca dimensions in figure - the clustering seems to pick up on different orientations of the facedifferent expressions (the third cluster center seems to show smiling face)and the presence of shirt collars (see the second-to-last cluster centerfor more detailed viewin figure - we show for each cluster center the five most typical images in the cluster (the images assigned to the cluster that are closest to the cluster centerand the five most atypical images in the cluster (the images assigned to the cluster that are furthest from the cluster center)in[ ]mglearn plots plot_kmeans_faces(kmpcax_pcax_peopley_peoplepeople target_namesclustering