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v2007.09.13 - Convex Optimization

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24 CHAPTER 1. OVERVIEWFigure 5: Swiss roll from Weinberger & Saul [278]. The problem of manifoldlearning, illustrated for N =800 data points sampled from a “Swiss roll” 1Ç.A discretized manifold is revealed by connecting each data point and its k=6nearest neighbors 2Ç. An unsupervised learning algorithm unfolds the Swissroll while preserving the local geometry of nearby data points 3Ç. Finally, thedata points are projected onto the two dimensional subspace that maximizestheir variance, yielding a faithful embedding of the original manifold 4Ç.

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