At the end of April, Tara Lynn Southard arrived at the Mattapan branch of the Boston Public Library on a mission. She had a stack of flyers in her hands. “Part-time PCA needed” they read, with a list ...

A good way to see where this article is headed is to take a look at the screen shot of a demo program shown in Figure 1. The demo sets up a dummy dataset of six items: [ 5.1 3.5 1.4 0.2] [ 5.4 3.9 1.7 ...

PCA documentation tends to use the term standardization, but I often use the more general term, normalization. Each value is normalized using the formula x' = (x - u) / s, where x' is the normalized ...