... include such features as creating a pseudo-variable for “North,” one for “South,” another for “East,” one for “West,” and perhaps others for other features of interest, such as population density ... of pseudo-variable inputs for each alpha label—that is, for this example, a unique pattern for each item in the produce department. The domain expert must make sure, for example, either that ... from there to each of the nearest data points in each dimension. The mean distance to neighboring data points serves as a surrogate measurement for density. For many purposes this is a more...