4 recode —Recode categorical variables . gen nx3 = 6-x3 . forvalues i = 1/3 { generate nx‘i’ = 6-x‘i’ } In the categorical variable religion, we want to change 1, 3, and the real and integer numbers 3 through 5 into 6; we want to set 2, 8, and 10 to 3 and leave...
Feature engineering is the process of creating new features or transforming existing ones to improve the model's performance. This may involve techniques such as one-hot encoding for categorical variables, polynomial feature expansion, or domain-specific transformations. ...
For example, in the case of only categorical covariates were considered, the Ham- ming distance from the associated complete disjunctive tables can be used. In the case of continuous covariates, one can use directly the Euclidean or Manhattan distance. Finally, in the case of mixed types of ...