Knowledge representation is an important but often misunderstood concept. Here are some examples to show why it matters.

Correspondence analysis is an exploratory data analysis technique for the graphical display of contingency tables and multivariate categorical data. Its history can be traced back at least 50 years ...

When sample units are plotted against orthogonal principal axes in a components analysis, the concept of (Euclidean) distance plays a central point in interpretation. Variants of such diagrams are ...