17.3 Product Catalog Maps
In this section, we introduce two ways to create a product catalog map. We start by describing a product catalog map based on multidimensional scaling (MDS), which is combined with a k-means clustering algorithm to highlight some prototypical products. Thereafter, a product catalog map based on nonlinear principal components analysis (NL-PCA) is introduced which uses the category points to provide a navigation mechanism. These two methodologies were published earlier in [21] and [24].