The latest xkcd: (As usual, click on the image for a larger version.) I think that this is the first reference to eigenanalysis in a widely-read comic strip. (It's not a first for popular culture: Dudley Eigenvalue, DDS, was an important secondary character in Thomas Pynchon's novel V. But that's another story.) As the wikipedia … Continue reading Eigenfeet, eigenfaces, eigenlinguistics, …