Norms, Proximities, Features and Dualities
Get your facts first, and then you can distort them as much as you please (Mark Twain, 1835–1910).
The first part of this book dealt with the three classical problems: finding structure within data, determining relationships between different subsets of variables and dividing data into classes. In Part II, we focus on the first of the problems, finding structure – in particular, groups or factors – in data. The three methods we explore, Cluster Analysis, Factor Analysis and Multidimensional Scaling, are classical in their origin and were developed initially in the behavioural sciences. They have since become indispensable tools in diverse areas including psychology, psychiatry, biology, ...