What a great example of the power of PCA! I absolutely love that you can give it nothing but a set of raw dimensional data, and it will give you back a set of a

What a great example of the power of PCA! I absolutely love that you can give it nothing but a set of raw dimensional data, and it will give you back a set of axes that are (often) human interpretable. I remember the first time I did that for a set of children's ratings data, and got to see games/movies/books spontaneously spread themselves out along fairly clear age and gender lines. I often wonder what other novel applications it can have.