Principal Component Analysis: Resources for an Essential Application of   Linear Algebra
  Principal Component Analysis (PCA) is a highly useful topic within an introductory Linear Algebra course, especially since it can be used to incorporate a number of applied projects. This method represents an essential application and extension of the Spectral Theorem and is commonly used within a variety of fields, including statistics, neuroscience, and image compression. We present a synopsis of PCA and include a number of examples that can be used within upper-level mathematics courses to engage undergraduate students while introducing them to one of the most widely-used applications of linear algebra. 
Stephen Pankavich and Rebecca Swanson
math.HO